“Multiple groups of swimmers” had to be rescued Thursday, and a New York man died in the Atlantic Ocean near Avon.

Cape Hatteras National Seashore received a 911 call at 3:28 p.m. for a “multi-person rescue” in front of Ocean Isle Loop. A crew from the Hatteras Island Rescue Squad arrived to find several groups of swimmers in distress, the seashore said in a news release.

The rescue squad dispatched two jets skis and began bringing swimmers back to the beach. A bystander on a surfboard also assisted. At least six people were brought out of the water, seashore officials said.

A 48-year-old man visiting from Sayville, New York, received CPR on the beach, but couldn’t be revived. He was the only fatality. None of the swimmers had flotation devices.

The National Weather Service on Thursday issued a moderate risk of rip currents for Outer Banks beaches.

A moderate risk mean conditions support the development of stronger, more frequent rip currents – and only swimmers who know how to escape rip currents should enter the water.

Thursday’s death is the fourth swimming-related fatality on the seashore this year. Between June 3 and June 6, three men died in ocean-related incidents at the seashore, two in one day. And in April, 4-year-old Wesley Belisle of New Hampshire was swept away while walking on the beach in Kitty Hawk with his mom.

Last year, there were seven ocean-related deaths in Cape Hatteras.