SAN JOSE -- Two people were forced to find new living arrangements after a two-alarm fire at their house Sunday morning, a fire captain said.

The blaze in the 4100 block of Rosenbaum Avenue near the West Capitol Expressway started around 12:45 a.m., San Jose Fire Capt. Rob Brown said. The exterior of the single-story house burned, and the blaze also moved into the attic, he said.

Crews activated a second alarm, because of excessive debris and personal belongings inside that required removal to make a path to the attic, Brown said.

The two people living in the house were not home when the fire started, Brown said. They are staying with friends until they get their housing situation resolved, he said.

Investigators are working to determine the cause, he said. The fire was not deemed suspicious and not believed to be related to a rash of fires that have plagued the downtown area since Wednesday.

Contact Rick Hurd at 925-945-4789 and follow him at Twitter.com/3rdERH.