Against watford to help put Manchester City top of the table. Well have that and the rest of the days sporting news in sportsday in half an hour. Good evening and welcome to bbc news. Detectives investigating the bomb attack on the London Underground have arrested an 18 year old man, on suspicion of leaving the device on the train. They say they are keeping an open mind over whether more than one person was involved in the attack. 30 people were injured when it detonated yesterday at Parsons Green station. The man was taken into custody this morning in the port area of dover. The Police Believe the attack was motivated by islamist extremism. This evening an armed Police Operation is under way in sunbury on thames, in surrey. Robert hall is at new scotland yard. Deputy assistant commissioner from the counterterrorism unit has made a statement, he has been leading us through what has been a very fast moving day here in london, on the coast of kent and back into surrey at lunchtime. There