families and how the witnesses are being handled at this moment, but we are going to go back to sarah doleup. >> reporter: it appears to be a sreu active scene. we have seen law enforcement vehicles go speeding down the street at high rates of speed and you can see all of the police cars lined up with the lights going on and the crime tape. the nightclub, it's about a quarter of a mile there down the road, and it's past the subway, if you see that subway sign and past the light. part of the reason we are speculating of why we have been kept back so far has to do with the controlled explosion in the last half hour, and what we have scene is more police cars arriving and then the helicopter up ahead left the area a short time later, and a series of stau cotto bursts, and it sounded like gunfire but we have not confirmed that on the scene and we have been talking to eyewitnessesmatic tales to tell. it was latin night at the club and people were having a good time, and it was packed when the gunfire rang out. one witness said he was not sure it was gunfire and then he saw flashes of light coming