At least 18 were injured in a two-boat crash just west of Sands Cut in Elliott Key Sunday evening, according to officials.
The boats were heading into dock at about 6:30 p.m. when they collided, said Jorge Pino, spokesman for the Florida Fish and Wildlife Conservation Commission.
Three people suffered serious injuries and one was airlifted to Jackson Memorial Hospital, said a statement from the FWC.
FWC spokesman Jorge Pino said at least 18 people were injured in the crash. Originally, authorities had said three boats were involved, but then later said it was actually two boats.
The cause of the crash was not immediately known.