The man found by searchers on Gerrish Island in Kittery this afternoon was identified by U.S. Coast Guard officials as David Sporcic, 65, of Conway, N.H.

The man, who was pronounced dead in an area hosptial, apparently was duck hunting. The Maine Marine Patrol found Sporcic’s car and trailer at Kittery Point. His boat remains missing, but decoys, hip waders and a life jacket were located.

The cause of death remains unclear, according to the Coast Guard. The Maine Marine Patrol will be conducting an investigation.

Earlier this afternoon, the Coast Guard was notified by the fishing vessel Vickie Ann that there was a camouflage boot, life jacket and several duck decoys in the water.

Coast Guard Station Portsmouth Harbor arrived on scene around 2 p.m. Coast Guard Air Station Cape Cod launched an HH-60 Jayhawk helicopter at around 3 p.m., which was en route to the search area. The Coast Guard cutter Reliance, Coast Guard Auxiliary Air, Maine Marine Patrol and New Hampshire Marine Patrol are also involved in the search.

A Maine Marine Patrol crew found Sporcic on Gerrish Island following a search in the Piscataqua River. He was unresponsive.

An HH-60 Jayhawk helicopter crew from Coast Guard Air Station Cape Cod transported him to Pease International Airport where they were met by an ambulance crew for transport to a hospital.