LEWISTON — Police on Friday were investigating the death of a man who shot himself in the parking lot at St. Mary’s Regional Medical Center.

Police said the man, who was not identified, was sitting in his pickup truck near the hospital emergency room entrance about 2:30 p.m. when he shot himself in the head.

Nobody else was injured.

Witnesses nearby at the time reported hearing a single gunshot.

Police cordoned off the area while their investigation got underway. The shooting remained under investigation later Friday.