MONHEGAN ISLAND (AP) — The Coast Guard has turned a search into a recovery mission for the body of a 32-year-old Irishman swept off rocks while visiting Maine’s Monhegan Island for a wedding.

Coast Guard Lt. Colleen McCusker said Saturday that 33-year-old Thomas Clarke, an Irish national, is believed dead. She said the Coast Guard continued to look for his body.

Clarke had walked to Norton Ledge to explore a cave Friday afternoon when a wave churned up by Hurricane Katia knocked him into the water. Four others tried to save him but lost sight of him. Three made it back to shore and a fourth was rescued.

McCusker said the group was part of a wedding party.

Despite not hitting land, the Category 1 hurricane generated large swells along the coast.