A shooting in Tampa, Florida, killed at least two people and injured 18 more after a fight broke out between two groups on a street crowded with hundreds of people during Halloween celebrations early Sunday, authorities said.

The shooting happened just before 3 a.m. near a strip of bars and clubs in the 1600 block of East 7th Avenue in the Ybor City neighborhood, Tampa Police Chief Lee Bercaw told reporters at the scene.

“It was a disturbance or a fight between two groups,” Bercaw said. “And in this fight between two groups, we had hundreds of innocent people involved that were in the way.”