Two people have been killed and up to 16 more injured in a shooting at a nightclub in the Florida city of Fort Myers, police say.
The attack happened around 00:30 (04:30 GMT) on Monday at Club Blu, which was reportedly hosting a party for teenagers.
Three people have been arrested.
A police statement said injuries "ranged from minor to life-threatening" and that a number of people were in hospital.
Witnesses at the scene described the club as a "mad house.
Officers are trying to determine the motive of the shooting.