FLORENCE, Ala. — Authorities say a man has died after being hit by a bulldozer at a construction site in northwestern Alabama.

News outlets report that 55-year-old David Thornton of Carthage, Mississippi, was working on a new apartment complex in Florence on Wednesday.

Emergency personnel at the scene said Thornton was struck after he walked behind a bulldozer. He was pronounced dead at a hospital.

Florence police Sgt. Greg Cobb says no other workers were injured during the accident. Cobb says the Occupational Safety and Health Administration is investigating the incident.

The apartment complex is being developed by Mallory & Evans, a Scottsdale, Georgia-based company. The contractor is Montgomery Martin Contractors, of Memphis, Tennessee.