we will go back to sarah dollup. >> after hearing that explosion, orlando police confirmed it was a controlled explosion on their part and they are not releasing any more details past that, and it was a controlled explosion, a single loud bang, and that grabbed everybody's attention on scene, this following the helicopter that had been hovering overhead and the helicopter left the scene and we heard the bang and explosion and we learned that was a controlled explosion by the orlando police. >> has anything changed on the ground? any movement with the police cars or ambulances in response to the explosion? >> reporter: we do have more police cars pulling up on the scene and have not scene any ambulances go from our vantage point, and we have two airport k-9 units circling, so still a very active scene here. you heard that dramatic awful eyewitness account of what happened inside and the street is full of law enforcement and eyewitnesses and neighborhood residents filling the periphery around the tape, we hear gunshots, we just heard down the street, 10, 30, gunshots -- sounded like gunshots and