ROCKLAND  — Rockland police and the U.S. Coast Guard are investigating the death of a sailor whose boat was found floating adrift in Rockland Harbor earlier tonight.

Chris Berry, a spokesman for the Coast Guard in South Portland, said the Coast Guard base in Rockland received a report of a vessel adrift  just before 7 p.m.

Berry said the sailboat had collided with a couple of other boats in the harbor, whose crews reported that there did not appear to be anyone on board.

The Coast Guard sent a team to investigate and found an “unresponsive elderly man” in the pilot house.

He was taken to shore where an ambulance crew pronounced him dead.

Authorities are not releasing the man’s identity or age until his relatives have been notified.