(CNN)A shooting in a New Orleans park left 16 people injured, police said.

Several hundred people had gathered at Bunny Friend Playground for an impromptu music video filming late Sunday when two groups began firing on each other, the New Orleans Police Department said in a statement.

"Witnesses told police that both groups left the park on foot immediately after the shooting," police said. Officers were already in route to break up the gathering, when the shooting broke out.

"They were about a block away when they heard gunshots," police said.

Emergency medical workers took 10 of the injured to hospitals. Six more of the injured made their way to hospitals by other means.

Detectives are searching for surveillance video of the shooting and suspects.