Fort Bragg, CA- An explosion from a propane leak sent a property manager to the hospital when it blew the roof off a residence in the 33000 block of Mill Creek Road in Fort Bragg at about 9:20 a.m. Monday.

The manager of the residence sustained burns to about 20 percent to 30 percent of his body, a Mendocino County Sheriff’s Office report stated.

The property manager’s name is not known to the Fort Bragg Fire Department, Fire Chief Steve Orsi said Tuesday.

“A lot of the roof was missing,” Orsi said. Some of the building’s concrete block walls leaned out, he said.

That morning, the manager arrived at the residence to look for a propane leak that a neighbor said had been leaking for several days, the sheriff’s report stated.

The explosion also broke windows out of residences that were within several hundred yards of the building and spread debris to neighboring properties, the Sheriff’s Office stated.

At press time, authorities could only speculate as to what happened when the property manager arrived to investigate the propane leak.

Orsi said the explosion could have been caused by the air mixture, a light switch or a cigarette.

“We do not know,” he said.

Responding to Monday’s explosion and fire were the Fort Bragg Fire Department with help from the Mendocino County Sheriff’s Office and Cal Fire, which is investigating the incident.