A number of swimmers at Cape Hatteras National Seashore on the North Carolina struggled with rip currents Thursday afternoon, and while six were rescued a New York man died despite CPR efforts.

Park staff received calls for help just before 3:30 p.m. After arriving on scene, in front of Ocean Isle Loop in Avon, Hatteras Island Rescue Squad observed multiple groups of swimmers in distress.

The rescue squad dispatched two jet skis and began the process of bringing the swimmers back to the beach. A bystander on a surfboard also assisted with the rescue by bringing one swimmer to safety. At least six people were brought back to the beach.

However, the park reported that a 48-year-old man from Sayville, New York, was pronounced dead on the beach after he couldn't be revived.

None of the swimmers were using flotation devices.

There was a moderate risk of rip currents near the Avon area Thursday, according to the park. The National Oceanic and Atmospheric Administration considers a moderate risk to mean that “wind, wave, and tide conditions support the development of stronger or more frequent rip currents along the beaches. Only experienced surf swimmers who know how to escape rip currents should enter the water.”

This is the fourth swimming-related fatality off the seashore this year. There were seven swimming-related fatalities in 2017, and eight in 2016.