A Gorham man was killed Wednesday night when his motorcycle crashed on Bradley Drive, said Westbrook Police Chief Janine L. Roberts.

Roberts said Westbrook firefighters and police officers were called around 7:20 p.m. by a passerby to respond to a motorcycle accident in the vicinity of 65-79 Bradley Drive.

George Goriss, 52, of Gorham was pronounced dead at the scene. He had been riding a 2013 red-colored Harley Davidson.

“There is some evidence indicating the accident may be health related,” Roberts said in a press release. The cause of Goriss’ death remains under investigation. The state Medical Examiner’s Office has also been notified.

Police do not believe that any other motor vehicle was involved in the crash, but there were no known witnesses. Anyone with information concerning the accident is asked to contact the emergency dispatch center at 854-2531.