HAMPDEN  — Investigators are trying to learn what caused the death of a 55-year-old man found in his Maine apartment after a neighbor complained of smelling gas.

The Bangor Daily News says a woman called the gas company to complain about the smell in her Hampden apartment at about 12:45 p.m. Tuesday.

A technician and building maintenance man found the body in the bathroom of the second floor unit.

The man’s name is being withheld until relatives can be notified. Police say the death does not appear to be suspicious, but the investigation is continuing.

The building was evacuated for about 15 minutes, but a gas company technician said there was no leak.