PORTLAND, Maine (AP) — Officials in Portland, Maine, are investigating how a city maintenance worker was struck and killed by the trash truck he had gotten out of.

The city says 46-year-old Martin Dinh, of South Portland, was near the end of his shift on Sunday. Officials say Dinh's body was found about three hours later by someone who came to the public works facility to load materials.

The city says state police were called in to examine the vehicle and city police reconstructed the scene to try to determine a cause. The medical examiner's office and Labor Department were also notified.

Dinh was a maintenance worker for the public work's department's solid waste division. The city hired him Aug. 20, 2018.