RICHMOND -- Police and officials from the California Division of Occupational Safety and Health were investigating the death of a man who fell from a catwalk Tuesday morning at a drywall factory in Richmond.

At about 8:30 a.m., a man working on a catwalk inside National Gypsum Co.'s Richmond factory, located at 1040 Canal St., fell more than 75 feet off the catwalk, Richmond police Lt. Mark Gagan said.

According to Plant Manager Gene Whittington, the man was a contract worker who had been repairing the catwalk when he fell.

Whittington said that the company couldn't comment on the death because it was still under investigation, but that their main concern was for the worker's family and the man who witnessed the fall.

Gagan said that a man who was on the catwalk with the man who fell was not injured.

Richmond police are investigating the incident as an unexplained death, but Gagan said that police have no reason to believe that a criminal act led to the man's death.

Police were waiting to release the man's name until they have notified his family.