the judges say the verdict will be delivered on sunday or monday. i'm joined now by the bbc�*s phil mercer in melbourne. does this mean that all the evidence has been submitted and thejudges are now evidence has been submitted and the judges are now deliberating orders that process are still not complete?— orders that process are still not complete? novak d'okovic's f8 are not complete? novak d'okovic's fs now i not complete? novak d'okovic's f8 are now rests h not complete? novak d'okovic's f8 are now rests in _ not complete? novak d'okovic's f8 are now rests in the h not complete? novak djokovic's f8 are now rests in the hands i f8 are now rests in the hands of those three judges who have, for the past four or five hours, been hearing submissions on both sides, but the heart of this argument, the government says that novak djokovic was my presence in australia would stir up anti—vaccination sentiment —— fate. that is an argument that has been disputed by the serbian tennis star's lawyers. they say it is irrational and illogical, so we have had very detailed submissions from both sides during this appeal here in south—eastern australia today, sunday. so the next few hours well, you would imagine, be critical as those judges sift through all of those arguments. a great deal at stake. australia's reputation, you have to say, and especially that of the immigration minister alex hawke, and on the other side novak djokovic, hoping to be able to compete in the australian open, that starts on monday. so time is of the essence and now it is up to those three judges. did the essence and now it is up to those three judges.— those three 'udges. did the evidence _ those three judges. did the evidence determine - those three judges. did the l evidence determine whether djokovic is actually an anti—vaxxer or just a djokovic is actually an anti—vaxxer orjust a player anti—vaxxer or just a player who, anti—vaxxer orjust a player who, for medical reasons, doesn't want to have an injection?— doesn't want to have an in'ection? e ., , , injection? welcome a depends who ou injection? welcome a depends who you believe. _ injection? welcome a depends who you believe. the - injection? welcome a depends i who you believe. the government is asserting that his presence in this country would inflame or insight that anti—vax sentiment. now, novak djokovic's lawyers are saying no—one has asked him about his views on vaccination, that he is not an anti—vaxxer, although he hasn't had those vaccinations. so that goes to the very heart of this case, that the judges are now considering. it comes at a very sensitive time for australia. this is a nation now that is recording tens of thousands of new coronavirus infections every day. this is a highly vaccinated country. so the debate over novak djokovic is coming at an extremely sensitive and pivotal time for this nation. 50 sensitive and pivotal time for this nation.— this nation. so if the 'udges don't reach �* this nation. so if the 'udges don't reach a t this nation. so if the judges don't reach a decision - this nation. so if the judgesj don't reach a decision today and it goes into tomorrow, novak djokovic spends another night in the detention centre and if he is allowed to stay will he be in that first day of the tournament?— will he be in that first day of the tournament? tim, there are so many unknowns _ the tournament? tim, there are so many unknowns in _ the tournament? tim, there are so many unknowns in all- the tournament? tim, there are so many unknowns in all of- so many unknowns in all of this. what we do know is that novak djokovic was transferred to this immigration detention hotel, not too far from where we are in the centre of melbourne, on saturday, he was taken from their earlier today, sunday, to his lawyers' officers, where he has been monitoring proceedings and the judges are indicating that if they don't make a decision todayit they don't make a decision today it will be tomorrow. and, depending on what happens, we're sure if that will be giving novak djokovic enough time to hop on a car and go to melbourne park to compete. so there is a huge amount we don't know. what we do know what we are hoping is that in the next 24 are hoping is that in the next 2a hours we will have a definite decision as to whether novak djokovic stays or he goes. novak d'okovic stays or he eoes. , . .,, ., ., goes. public opinion, though, chan . in: goes. public opinion, though, changing or— goes. public opinion, though, changing or hardening - goes. public opinion, though, changing or hardening in - goes. public opinion, though, l changing or hardening in terms of him appearing in the tournament. i of him appearing in the tournament.— of him appearing in the tournament. i think public oinion tournament. i think public opinion is _ tournament. i think public opinion is a _ tournament. i think public opinion is a very - tournament. i think public opinion is a very flexible l opinion is a very flexible thing. this is a country of 25 million people, so it is very difficult in a few sentences to some of the mood of an entire nation. but if you're going on online polls and other indicators, there are many australians who are very frustrated at what they see as a privileged, wealthy athlete who has somehow managed to evade the rules. however, novak djokovic's supporters who have gathered here in melbourne would have a very different decision. they believe he has been treated unfairly, that he has been made a victim of an example of. so it is very difficult to assess how an entire nation feels. safe to say, it is a very divisive issue. ~ . issue. 0k. phil mercer with the latest. issue. 0k. phil mercer with the latest we _ issue. 0k. phil mercer with the latest. we will _ issue. 0k. phil mercer with the latest. we will go _ issue. 0k. phil mercer with the latest. we will go back - issue. 0k. phil mercer with the latest. we will go back as - issue. 0k. phil mercer with the latest. we will go back as soon | latest. we will go back as soon as we get any developments there. let's turn to the us where, in the last hour, police in the state of texas say a siege at a synagogue has come to an end and a man who took four people hostage has been killed. the group, which included the rabbi, are now all safe after the ten—hour stand—off at the congregation beth israel synagogue in the city of colleyville. special agent matthew desarno of the dallas fbi said nearly two hundred law enforcement officers had worked to resolve the situation and after paying tribute to them, he focused on those who had engaged directly with the hostage—taker. iam also i am also extremely proud of the team of negotiators, fbi agents, and local police officers who worked all day long engaging subject and, likely, save the lives of the subjects just through their engagement. it's very likely this situation would have ended very badly early on in the day if we had not had professional, consistent negotiation with the subject. i do not have any information right now that indicates that this is part of any kind of ongoing threat. we obviously are investigating. we will continue to investigate the hostage taker. we will continue to investigate his contacts. our investigation will have global reach. we have beenin will have global reach. we have been in contact already with multiple fbi legates to involve tel aviv and london. we have worked closely with the jewish federation and i will continue to do that and we will continue to do that and we will continue to do that throughout the country. we do believe, from our engagement with the subject, that he was singularly focused on one issue and it was not specifically related to the jewish community, but we will continue to work to find motive and we will continue on that path. in terms of the resolution of the incident, the hostage taker is deceased. we will conduct an independent investigation, my evidence response team will be here to process the scene, 18 from washington will be here to conduct an independent investigation of the shooting incident and that is the way we handle those things, our standard operating procedure. isolated matthew desarno speaking there. now to china, where health officials in beijing have confirmed the city's first locally—transmitted case of the omicron variant of covid—19. it was detected in the haidian district, where many technology companies are located. elsewhere on friday, the authorities in the southern chinese city of zhuhai suspended public bus services after detecting at least seven cases of omicron. with just three weeks before the chinese capital hosts the winter olympic games, the authorities' will be hoping they can contain this strain of the virus stephanie prentice reports. the world's most populous capital city trying to avoid the most contagious form of covid yet. just three weeks ahead of the winter games, beijing's luck has run out. translation: on the morning of january the 15th _ the testing agency reported abnormal nucleic acid testing results. the results remain positive with detection of the mutations of the omicron variant. omicron�*s distinctive mutations found in one of the city's 21 million residents testing due to work requirements. the case, said to be mild, could still be china's biggest challenge so far to their zero covid strategy. they want to use the winter olympics to showcase not only athletic achievement but also the success of that strategy but if they don't, like, if they choose not to take draconian measures like a full lockdown you will see the silent spread of the omicron variant. with the pressure on, officials say the containment plans are working since the country's first omicron case was reported a week ago. the cases appearing then in shanghai and guangdong. translation: the spill-over of infections is _ gradually declining. it is necessary to continue to do a good job in the management and control of the quarantine sites. the haidian district of the city known as its tech hub is now facing restrictions on places linked to the omicron case, the latest in a series of experimental measures like crackdowns on public transport in cities across the country. the winter games will now be held in what officials call a closed loop meaning limited spectators in venues, no overseas visitors, and personnel only interacting within their bubble. whether that will be enough to stop a wave of cases and safeguard the games will only become clear in the coming weeks. stephanie prentice, bbc news. the prime minister of new zealand says a tsunami has inflicted significant damage on tonga, but no—one is known to have died. communications, however, remain difficult. local mobile phones are not working and ms ardern said she had been unable to reach her tongan counterpart. new zealand and the us are among countries to have pledged support to the island. jon donnison reports. the violence of this underwater volcano was captured from space, triggering tsunami warnings across the pacific. tonga, made up of more than 170 islands, was the first to be hit. this video, which is yet to be verified, is thought to be from within a church. 500 miles away in fiji, they felt the force too. widespread coastal flooding, but thankfully no casualties reported so far. the volcano erupted just north of tonga's main island. but the shockwaves swept across the globe, with tsunami alerts stretching from chile to japan. it was very short but very explosive. so it tells us there was enough energy released in this very short—lived blast that was able to essentially explode water, push water out of the way, and create this shock wave that sent ripples literally across the globe. in california, many beaches were closed as a precaution — and that's more than 5000 miles from where the volcano erupted. john donnison, bbc news. joe sirard is a meteorologist with the national oceanic and atmospheric administration, based near los angeles. he says it's been a worrying time, but the worst seems to be over. we had some minorflooding, we had some surges into various harbours with some damage to some boats and that sort of thing. but it was an advisory, which is the lesser extent of the tsunami versus a warning. so actually we kind of dodged a bullet along the west coast here, with just advisory tsunami conditions. and so no real damage to property or any casualties? well, no casualties that i'm aware of. there was, locally here, there was a boat in the harbour that sank due to the surge in the harbour and some boats lost their moorings and that sort of thing. but that's pretty much the extent of what the information we have received here. you are many thousands of miles away, aren't you, is this a region, tonga, which has a history of volcanic activity like this? well, usually when we get tsunamis on the west coast it is due to earthquakes. so this is an exceptionally rare event where a volcano that was mostly underwater exploded and caused the tsunami across the pacific. but usually it's earthquakes. the pretty much any earthquake along the pacific rim we do get tsunamis along the west coast, even off of earthquakes of chile, for example. so there is a wide scope of areas in the pacific rim that can cause tsunamis here on the west coast. ok, and you say these warnings are rare. can you remember when the last one was? well, the most recent that i can recall this from the japan earthquake in 2011 and it caused a pacific—wide tsunami. on the west coast we had tsunami warnings north of point conception, so the los angeles area, which is south of point conception, had an advisory at that time. but up on the central and northern california coastline and further north there were tremendous amounts of damage incurred as a result of that major earthquake and tsunami back in 2011. joe sirard speaking to me a little earlier. let's return to our breaking news this hour: all four people taken hostage at a synagogue in a suburb of dallas in texas have been freed, but the police say the man who held them for more than ten hours has died. let's speak to jessika harkay, who's a reporter for the forth worth star telegram, a local newspaper. it is all over, the hostages are safe, the hostage taker not? ., �* , are safe, the hostage taker not? . �*, . are safe, the hostage taker not? . not? that's correct, that's what the _ not? that's correct, that's what the police _ not? that's correct, that's what the police came - not? that's correct, that's what the police came outl not? that's correct, that's i what the police came out and reported. we had the opportunity to speak with the fbi agent and the local police chief involved and they said that after about 12 hours of an ongoing situation everything has finally ended. the four hostages are all safe, they are currently being, they are talking to the fbi right now and expected to be reunited with their families later tonight. with their families later toniaht. ~ with their families later toniaht. . ., with their families later tonight-— with their families later toniaht. . ., ., tonight. we also heard there had been _ tonight. we also heard there had been negotiations i had been negotiations stretching i think into what, 20 hours? do we know more about what this man wanted? so 20 hours? do we know more about what this man wanted?— what this man wanted? so yeah, the negotiations _ what this man wanted? so yeah, the negotiations were _ what this man wanted? so yeah, the negotiations were about i what this man wanted? so yeah, the negotiations were about 12 i the negotiations were about 12 hours, everything started around 11 o'clock in the morning and we were able to speak with police probably 30 minutes ago, so they were saying that their investigation remains ongoing, they are not releasing any information right now. they know who the suspect is, they are not going to identify him, they don't want to name any weapons he may or may not have had yet, they don't want to release any motive, everything is ongoing at the moment.— at the moment. 0k, your cameraman _ at the moment. 0k, your cameraman has - at the moment. 0k, your cameraman hasjust i at the moment. 0k, your cameraman hasjust leftl at the moment. 0k, your cameraman hasjust left i cameraman has just left i think, cameraman hasjust left i think, sitting next to cameraman has just left i think, sitting next to you there. so what happens now? we heard that they would be speaking to intelligence agencies around the world. there obviously seems to be some international context and dimension to this?— dimension to this? yeah, they said they are _ dimension to this? yeah, they said they are going _ dimension to this? yeah, they said they are going to - dimension to this? yeah, they said they are going to look- said they are going to look into the suspect, look into his motives, they are going to be looking into any contact he had. i don't know whether that means family, friends, acquaintances. they didn't explain anything yet so it's just kind of a waiting game on the ongoing investigation and when police feel comfortable to release that information to us. and has security been stepped up and has security been stepped up around synagogues as other places of worship? i up around synagogues as other places of worship?— places of worship? i would believe so. _ places of worship? i would believe so. they _ places of worship? i would believe so. they didn't i places of worship? i would i believe so. they didn't answer too many questions after the press conference so hopefully we can get more information in the upcoming days. being from fort worth just about 20 minutes away from here, i know our organisation is going to continue to follow and monitor this so hopefully we will learn more from law enforcement and looking into security at demagogues locally. looking into security at demaeeoueslocall . . ,, demagogues locally. 0k, jessika harka , demagogues locally. 0k, jessika harkay, thank— demagogues locally. 0k, jessika harkay, thank you _ demagogues locally. 0k, jessika harkay, thank you very - demagogues locally. 0k, jessika harkay, thank you very much i demagogues locally. 0k, jessika harkay, thank you very much for| harkay, thank you very much for that date. —— that update. lawyers for the duke of york, want to question two people, as part of the civil sexual abuse case being brought by virginia giuffre in america. according to court documents, prince andrew's legal team argue ms giuffre may be suffering from false memories, and they want to hear from her husband and her psychologist. prince andrew denies all the allegations against him. here in the uk, there's no let up in the pressure on the prime minister over parties held in downing street during coronavirus lockdowns. one of his senior mp's and former minister tobias ellwood says borisjohnson must lead or step aside and other conservatives in government report being inundated with messages from the public expressing their anger over the growing list of parties. here's our political correspondent, iain watson. borisjohnson has come under renewed pressure following number 10's apology to buckingham palace over a leaving do held last year on the eve of the duke of edinburgh's funeral. so today the labour leader urged conservative mps to force him out. of course there's a party advantage in him going, but actually it's now in the national interest that he goes, so it's very important that the tory party does what it needs to do and gets rid of him. usually when opposition mps call for a prime minister to go, the troops rally round, but today the conservative chairman of the commons defence committee, tobias ellwood, did not exactly defend his boss when he told the bbc borisjohnson should lead, or step aside. outside downing street, demonstrators against a forthcoming police bill were making their views of the prime minister known. far more subtly, some of his own mps have also been doing so. what may be worrying the prime minister is that some of his former supporters now want him to go. one mp, elected in 2019, told me he owed his seat to borisjohnson but now, he says, this feels terminal, and he should go quickly. and another mp i spoke to several days ago, who told me then that he thought borisjohnson could ride out this political storm, got back in touch today to say he's now damaging the conservative brand and it was a question of when, not if, he leaves number 10. no cabinet minister, though, has broken ranks and there is hope inside downing street that an investigation by a senior civil servant may say that the prime minister has not broken covid rules. and the expected lifting of restrictions later this month could improve his mps' mood. the conservatives snatched the seat from labour and now the conservative voters are in the market for a differently does. i'm 50-50 market for a differently does. i'm 50—50 as to whether he should go or not stop loose so many people have lost people and they all stood there telling us to do one thing and doing another, i'd just think it's disgraceful. doing another, i'd 'ust think it's disgraceful._ it's disgraceful. some conservative - it's disgraceful. some conservative mps i it's disgraceful. some conservative mps are | it's disgraceful. some i conservative mps are saying it's disgraceful. some - conservative mps are saying it is another on the doorstep that will determine whether boris johnson is shown the door. iain watson, bbc news. let's get some of the day's other news. thousands of people have held demonstrations in paris and other cities across france, against government plans to introduce a vaccine pass. the pass would mean people have to prove they've been vaccinated against coronavirus and not merely that they've tested negative in order to visit cafes, restaurants, and other public venues. nino cerruti, one of the great italian designers and fashion entrepreneurs, has died aged 91. starting work in his family's textiles mill, cerruti would later branch out to design clothes for hollywood stars including jack nicholson and julia roberts. scientists at the university of hull in the north of england have developed a new way of cooling—down computers and reducing their impact on the planet. the system can be used in computer data centres that generate huge amounts of heat from internet activity. the new technology is saving money and co2, as our environment correspondent paul murphy reports. ina in a laboratory on the outskirts of whole a high—tech system that has taken 15 years to develop. essentially it's a way of calling computers down without the expense and carbon emissions associated with conventional air—conditioning. it's driven by water evaporation, not by a refrigerant. if it evaporates the water you have loads of energy be taken away by changing the water liquid to the moisture in the air. data centres are places few of us will ever visit, but they are the backbone of our internet use. processing everything from simple e—mail to online shopping. and all of this generates heat. hull city council has its own data centre, and by using this new technology the authority's been able to save thousands off its cooling bills and reduce emissions. everything we have nowadays, we just store electronically. so it is a growing carbon impact for the council, but also globally as well. it is a big global challenge. so the opportunity to work with the university is really important, to actually take advantage of the innovation at the university and the research that is done there. and this new cooling technology is generating interest from outside the world of computers. what is very exciting is it is not only for data centres, it can be used for other areas of cooling, including agriculture and including other industrial process cooling. and also office cooling. this is still a pilot project, but the technology is ground—breaking and is already attracting attention from around the world. paul murphy, bbc look north, at the university of hull's aura innovation centre. experts in scotland are hopeful that progress is being made, in efforts to save the native red squirrel. alexandra mackenzie reports. the native red squirrel. not a common sight in the uk, but now limited to areas like here in barhill wood in dumfries & galloway. how many red squirrels would you have in this wood? in november last year we had over 30, which is an exceptional amount. you know, there's not many places in scotland where you'd find that level. so what makes this the ideal habitat for the red squirrel? principally it's the age of the trees that they are now producing cones regularly and that enables food to be available at different times of the year. the larch produces cones in the summertime, the scots pine in the winter, so it gives the squirrels a good wide feeding pattern. but, of course, they are in competition with the grey squirrels. wherever you get the grey squirrels, the reds are going to disappear, unfortunately. the scottish wildlife trust said having a predator, the pine marten, helps to control the grey squirrel population. but that is not enough. grey squirrel control is going to be necessary for a long time yet. so that will be the key thing that needs to keep continuing in a targeted and landscape—scale approach, you know, which is tricky and hard work but what is needed if we want to keep our red squirrels. the battle for survival with the more feisty grey squirrel is likely to continue for some time. alexandra mckenzie, bbc news, kirkcudbright. here's hoping that that programme will be successful. 20 more on the website on all the stories in this bulletin. from me and the team, hope to see you soon. —— plenty more on the website. hello, there. saturday was a rather cloudy day across much of the country. sunday looks brighter once we lose this weather front which is spreading southwards across the country, being a band of cloud and showers. and you'll also notice it will be a breezy day pretty much across the board, but certainly in the north, where we'll have gales across northern scotland. you can see why on the pressure chart, quite a few isobars here. this is the weather front spreading its way southwards across the country — this one brought some showers to southern areas overnight, that will eventually clear away and take any showers for the far south—east of england. this weather front in the north will continue to sink southward through the day — barely anything on it by the time it reaches england and wales, in fact, and to be fragmenting to allow for quite a bit of sunshine to develop. and there'll be lots of sunshine across the northern half of the country. a breezy day, like i mentioned, windy in the north with gales for the northern isles. our air source will be coming in off the atlantic and, with quite a bit of sunshine around, it should feel a touch milder with highs of 8—11 celsius for many of us. now, as we move into sunday evening and overnight, the winds ease down for many — still quite breezy across the north uk, further showers for the northern isles, but high pressure begins to build in clear skies. temperatures will drop — and again, it's going to be a colder one than what we've seen through saturday night, with temperatures below freezing, and also some dense mist and fog patches around. our area of high pressure then, building in for monday, will bring a lot of settled weather — you can see barely any isobars on the chart, so winds will remain light all day for most of us. still some breeze and some cloud for the far north of scotland, but elsewhere, it's a chilly start with some frost and fog, which will clear and then leave actually a pretty pleasant day. quite a lot of sunshine up and down the country. after the chilly start, temperatures will reach highs of 7—9 celsius for most of us. as we move out of monday into tuesday, we see this frontal system sweep in off the atlantic, and that'll bring a wetter and windy day for the northern half of the country, the south still influenced by this area of high pressure. so it turns wet and windy for northern ireland, western scotland first, spreading across the rest of scotland, perhaps northern england into the afternoon. a chilly start with some fog across central and southern areas, but also a little bit of sunshine tending to break through in the afternoon as temperatures range from 7—11 celsius. thereafter, high pressure dominates the scene for the rest of the week and into the following weekend. so a lot of fine, unsettled weather with overnight frost and fog. see you later. this is bbc news. the headlines: the headlines: judges in the australian judges in the australian federal court have retired federal court have retired to consider the arguments made to consider the arguments made by lawyers about the withdrawal by lawyers about the withdrawal of novak djokovic's visa of novak djokovic's visa on public health grounds. on public health grounds. the number one men's tennis the number one men's tennis player is facing deportation player is facing deportation and a three year ban and a three year ban on obtaining a visa on obtaining a visa if he loses the appeal. if he loses the appeal. police in texas say a hostage police in texas say a hostage taker has been killed taker has been killed after a siege at a synagogue after a siege at a synagogue in the city of colleyville. in the city of colleyville. four people who were held four people who were held for ten hours are now for ten hours are now free and safe. and mobile networks are down. free and safe. it happened as a service it happened as a service was being streamed live was being streamed live over the internet. over the internet. the prime minister of the prime minister of new zealand says a tsunami has new zealand says a tsunami has inflicted significant damage inflicted significant damage on the island of tonga. on the island of tonga. there are no known deaths, there are no known deaths, but communication with but communication with the island is difficult, the island is difficult, and mobile networks are down. the tsunami was caused by the eruption of an underwater volcano near tonga. those of the headlines here on bbc news. now on bbc news it's time for the media show.