A fire at a Fort Bragg vacation house was arson, and a young man who had been staying at the home is being sought by police, authorities said.

The man told neighbors he had permission to be at the Noyo Heights Drive home and he was doing yard work for its owners, Fort Bragg Sgt. Brandon Lee said.

But the owners, who live out of the area, told police they had not asked anyone to stay and work at the house, Lee said.

Firefighters were called at about 7:50 a.m. Sunday when smoke was seen coming from the home. They were able to keep the flames to a stairwell and part of a room, a fire official said.

The rest of the two-story house suffered smoke, water and heat damage. A damage estimate wasn't available Monday.

Evidence showed that the fire was set on purpose, Lee said.

Officers also found evidence of drug manufacturing.

Police asked that anyone with information about suspicious people or activity in the neighborhood contact Officer Andrew Kendl at 961-2800 ext. 169 or at akendl@fortbragg.com.