A man died Monday following a workplace accident at a Suncor site near Fort McMurray, Alta.

Alberta Occupational Health and Safety confirms the man, 37, was performing maintenance work on a D9 dozer, a heavy piece of machinery, at the Steep Bank Millennium Mine.

A sump pan — a pan that collects oil and refuse — fell and hit him on the head.

He died after he was taken to hospital in Fort McMurray.

The man worked for North American Construction. He was from outside Alberta and his family has not yet been notified of his death. 

"We are devastated by this news and deeply saddened by the terrible and unexpected loss of our co-worker and friend." Martin Ferron, president and CEO of North American Construction Group, said in a news release. 

"I know there's nothing I can say that will make this loss easier for the employee's loved ones to bear, but I can assure them that we will do everything within our power to provide the support they need during this extremely difficult time."

The site was secured and closed to workers Monday and reopened Tuesday. 

The investigation has been turned over the OHS. 

This is the fourth death at a Suncor site this year.