A 5-year-old Brooklyn boy drowned while playing in the waters off Riis Park on Saturday, authorities said.

Little Ezekiel Gray, of East Flatbush, was pulled out of the water by a lifeguard who spotted him floating unconscious and brought him to the beach.

The lifeguard, along with EMS paramedics and National Park Police, frantically administered CPR, but the boy died at Brookdale Hospital.

Riis Park is part of Gateway National Recreation Area.