A nation on edge. A special edition of world news tonight begins now. Good evening from cleveland, where the Republican Convention will begin tomorrow. But tonight, this country finds itself once again mourning the loss of Police Officers shot and killed. First dallas, now baton rouge. Three officers killed today. This time, they were responding to someone in the streets with a gun, a 911 call. Six officers shot before the gunman was taken down and killed. Tonight, authorities in l. Louisiana making it clear, they do not believe other gunmen are on the no mistake, justice will be done. Heres eva pilgrim. Reporter tonight, baton rouge reeling after a man opened fire at a gas station. A lady came up and said there was a subject walking with a coat and an Assault Rifle out reporter just after 8 30 this morning, reports of a man dressed in all black with a rifle just a mile from state police headquarters. Brady vancel was on his way to work. When i looked over to the right there was a man running in my direction away from the body with an Assault Rifle in his hand. As soon as we got eye contact at one another, he stopped in his tracks and turned around and started sprinting the other way. Reporter police cars speeding to the scene, s. W. A. T. Teams moving in. Shots fired officer down shots fired officer down ive got a city officer down shots fired i dont know where the subjects shooting from reporter bullets flying as the suspect draws police into a gun bat. Police scanner traffic, capturing the chaos as officers are shot. Ive got two down back here, two down deputy down, deputy down reporter then, officers locate and kill the suspected gunman. Weve got eyes on him. Hes behind that transformer, appears to be on the phone. At this point it appears the scene is secure. Were going to have a robot come and check him out. Reporter at first, Law Enforcement not sure if the gunman acted alone, urging residents to stay indoors, choppers swirling overhead. There was a shooting. We believe there are multiple suspects. One suspect is deceased, multiple officers were shot. We do have some that have been killed. Thats what i know for sure right now. Reporter when its all over, three officers killed, three more injured, one of those in critical condition. Late today, authorities reassuring residents. What we do not believe or do we have any other sh baton rouge area. Reporter tonight officials in baton rouge asking for prayers. Until we come together as a nation, as a people, to heal as a people if we dont do that and this madness continues, we will surely perish as a people. And eva is with us live tonight. Initially, they were concerned there could be more than one shooter, but they do believe he was a lone gunman . Reporter thats right. Police say they shot and killed the lone gunman on the scene, and say it is no longer an active shooter situation. Thank you. And of course, the question, who was this lone gunman, what do we know about his motive . Heres brian ross. Reporter federal Law Enforcement officials identified the shooter as 29yearold gavin eugene long, an africanamerican from kansas city. Officers engaged the subject, and he died at the scene. Reporter police say it appeared to be a wellplanned ambush. He had a mask on. One subject. All black. Carrying a. R. Reporter one shooter tracked and killed at this convenience store. Right there. Stop, stop. To your left. To your left. Right there. We got eyes on him. Hes behind that transformer. Appears to be on the phone. Reporter in the wake of the Police Shooting of alton sterling in baton rouge, and then the deadly attack on police in dallas by a man who wanted to kill everything blue that moves, Law Enforcement in baton rouge had been put on alert last week by the fbi and Homeland Security for a possible attack. These threats are very viable and theyre very real. Reporter this fbi bulletin from its new orleans office, obtained by abc news, showed images from social media and warned, multiple groups are calling for or planning riots and or violence against Law Enforcement in baton rouge, louisiana, and shreveport, louisiana. Enforcement for over 30 years. I have never seen an environment this dangerous and this polarized as it relates to police in this country. And brian ross is with us tonight. Looking at both cases in dallas and baton rouge, it would appear both gunmen had military backgrounds. Thats right. And todays gunman, it would appear this is his 29th birthday. And roads are closed near the convention center. Thousands of officers are here, prepared for any threat. Pierre thomas, on whats being done with just hours to go until the Republican Convention. Backdrop of todays horror in baton rouge, cleveland is deploying an army and building a fortress to protect the Republican Convention. Just ten days ago, the ambush in dallas. Police officers that did not return home from work. Reporter it was just three days ago that president obama sat down for a National Town hall meeting on policing and race. We have to have police that are respected, and we have to recognize the fear their families go through every time they walk out that door. Reporter tonight, Law Enforcement sources tell abc news theyre facing perhaps the most volatile and complicated security picture in recent memory. Reporter those dump trucks are there to stop cars, trucks, or anything else from getting access to crowds. There are thousands of Police Officers in this city, including many on bikes, to give them the flexibility they need to get anywhere quickly. And there are camera situational awareness. All of this taking place in ohio, an open carry state. Theres a bushmaster predator. Reporter . I dont encourage anyone to come down here tomorrow carrying if you have no need to. Pierre, we know there was some confusion in dallas after the shootings, because of the open carry law there. A push by some to change it, at least temporarily, in ohio. Its not going to happen. The governor says he cant suspend the constitution on short notice. Pierre, thank you. And for the 17th time in office, president obama addressing a domestic mass targets Law Enforcement a coward. We need to be clear, nothing justifies violence against Law Enforcement. I want to bring in jonathan karl, here in the convention hall. We were just with the president in the National Town hall, and tonight, hes just addressed the nation again. Reporter over and over, hes had to address the nation. But theres something different. The fear is were looking at potentially a new trend. The intentional targeting and hunting of Police Officers. Thats why you heard real anger from the president. And my next question, a lot of eyes on donald trump and the tone, really both president ial candidates, listening to their every word with the edge. No question, these issues will be front and center as they take the stage. But david, these are the two most divisive candidates weve seen in in memory, at exactly the time that voters say they want to be unified. In our poll, 83 say they expect the next president to put a major focus on improving race relations. Jon, thank you. Both donald trump and Hillary Clinton have responded to the shootings in baton rouge. Tom llamas tonight on what, if anything, changes now with the convention in cleveland beginning tomorrow. Reporter tonight from donald trump, this message killed in baton rouge today. And, we are trying to fight isis, and now our killing our police. Our country is divided and out of control. The world is watching. Reporter this week the world will be watching trump. Its to be a wonderful day. Reporter kicking off his convention after the rocky rollout of his running mate. If you look at one of the big reasons that i chose mike, and one of the reasons is party unity, i have to be honest. Reporter trump speaking for nearly 30 minutes, mostly on other topics. Back to mike pence reporter but pence, ever the loyal soldier. Youre amazing. Reporter still, pence and trump have big differences. For one, pence has called negative campaigning wrong. Lyin ted. Little marco. Reporter on 60 minutes, pence was asked about trumps tone. What do you think about your running mates campaign and the tone and the negativity of it . I think this is a good man whos been talking about the issues the American People care about. But what about the negative side . He apologized for being a negative were different people. I understand that. Ill give you an example. Hillary clinton is a liar. I call her crooked hillary. Shes crooked hillary. He wont i i dont i dont think he should do it because its different for him. Reporter his mission now, selling the trump pence ticket as a solution to the turmoil in this country. Reporter Hillary Clintons team releasing this statement. Todays assault on Police Officers is an assault on all of us. And tom llamas is live with us as well. Overlooking the stage there. Really a delicate balance when it comes to tone here. And the trump team is confident the tone will match the nation . Right. They will be sensitive to the attacks in baton rouge, but they want to hammer the idea that trump candidate. David . Tom llamas with us in cleveland. And we hope youll stay with abc news for Convention Coverage all week long. World news tonight, good morning america, and nightline, all live from cleveland, and a Network Special report every night in primetime, 10 00 p. M. Well be here every night, gavel to gavel coverage on our live stream channel. In the meantime, overseas in turkey. After the attempted coup. And tonight, the United States is now caught in the middle. With turkey, demanding the u. S. Deport the turkish clerk in pennsylvania they claim helped fuel this. Heres Alex Marquardt from istanbul. Reporter with the rebellion crushed, tonight, the reckoning. President Recep Tayyip Erdogan ghtening his iron grip. More than 6,000 people now under re many of the rebel soldiers herded together, beaten by mobs, and herded on to buses. New video tonight shows the first moments of the attempted coup. This clip from the president s office of a tank barreling through traffic. Turkeys government now with threatening words for the obama administration, demanding the extra condition of the turkish cleric they accuse of spearheading the coup. We were pretty well stuck. Reporter flights have res e resumed, but many are wondering if this purge will affect tur y turkeys crucial role going against isis. Thank and from nice, france, more arrests as we hear from an american recovering in a hospital there. Heres linzie janis. Reporter tonight, french investigators looking into if the attacker had accomplices, questioning seven people. Including a couple who they believe provided him the fake weapons found in his rented truck. Tonight, dozens still hospitalized, including this california dad. When that white truck barreled through the crowd thursday night, Greg Krentzman was on the boulevard with his 9yearold daughter. The truck running over his foot. A stranger taking him to the hospital. Were there as he calls his daughter, also recovering tonight. I love you, and really proud of you. Reporter hes decembsperate thank the Good Samaritan that brought him to the hospital so he can thank him. Still ahead, the accused killer slipping out of handcu s handcuffs. Tonight, were learning about the alleged accomplices, sending signals to help him get away. The small plane crash. And the Severe Weather threat, the system moving east, and the dangerous heat on the way. There could be major storms in cleveland tomorrow during the convention. Rob marciano, standing by. Sfx crowd cheering sfx crowd booing sfx crowd chanting sfx crowd cheering sc johnson, a Family Company try duo fusion ing antacids . New, two in one heartburn relief. The antacid goes to work in seconds. And the acid reducer lasts up to 12 hours in one chewable tablet. Try new duo fusion. From the makers of zantac. Hey marc, how you feelin . Dont ask. This is what it can be like to have shingles. A painful, blistering rash. I never thought this would happen to me. If you had chickenpox the shingles virus is already inside you. 1 in 3 people will get shingles in their lifetime. Im going to go back to the eye doctor tomorrow. Its pretty close to my eye. I dont know how you do it. Talk to your doctor or pharmacist today about a vaccine that can help prevent shingles. We turn next this sunday night to new developments in the manhunt for an killer. Heres Ron Claiborne on the alleged accomplices who were ready and waiting. Reporter it was daring. It was bold. And it was planned to a t. 22yearold Dayonte Resiles slipping out of his handcuffs, shedding his jail jumpsuit, and racing from the courthouse to a waiting car. He took off his clothing, last seen in the hallway. Reporter tonight, the accused murderer is still on the run, but four people who police say helped him to escape, nabbed. Four of his accomplices are under arrest. Reporter Police Say Two of them 17yearold twins went into the courtroom with a cell phone. On the other end of the line, resiles girlfriend leque stern. And a friend, winston russell, outside in a getaway car with fresh clothing, including a police uniform. One or both of the twins coughed into the phone. They signaled when resiles jumped out of the jury box and fled the courtroom. Reporter resiles was whisked away, triggering a massive manhunt. Tonight Police Warning hes armed and dangerous. Ron claiborne, abc news, new york. Thank you. When we come back, extreme storms at this hour were watching, and the heat moving in. Rob marciano is here. And the small plane crashing, theres news tonight about the people onboard. Thats life. You diet. You exercise. And if you still need help lowering your blood sugar. This is jardiance. Along with diet and exercise. Jardiance works around the clock to lower blood sugar in adults with type 2 diabetes. This can help you lower blood sugar and a1c. 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Then tomorrow, cleveland, ohio, in the threat zone, as is western new york and in through northern new england. Damaging winds potentially there. And the heat, up over 100 across the heartland. And north and east, in some cases, it will feel like over 110 degrees. When we come back, late details on the Police Officers shot and killed in baton rouge. Who is done with treatments that dont give you clearer skin. Be the you who controls your psoriasis with stelara® lower your ability to fight infections and may increase your risk of infections and cancer. Some serious infections require hospitalization. Before treatment, get tested for tuberculosis. Before starting stelara® tell your doctor if you think y