(CNN) -- Five people were killed in a boating accident near Jacksonville, Florida, on Sunday evening, a rescue official said. CNN affiliate WJXT shows the scene of the deadly boating accident near Jacksonville, Florida, on Sunday. Twelve people were aboard the boat that crashed into 25-foot tugboat and barge at a dock and boat launch under construction on the Intracoastal Waterway in Palm Valley, said Jeremy Robshaw, a spokesman for St. Johns County Fire and Rescue. The remaining seven were hospitalized for serious injuries, he said. The accident happened about 7 p.m. about 20 miles southeast of downtown Jacksonville. Robshaw said rescuers couldn't initially reach the end of the unfinished dock, but laid plywood sheets on the structure to get to crash victims.
Rescue official: 12 people were aboard the boat near Jacksonville, Florida . Boat crashed into tugboat, barge and dock under construction . Five people killed; remaining seven take to hospital with serious injuries . Rescuers had to use plywood panels to reach the passengers .