A vacant house caught on fire in southwest Oklahoma City, firefighters said.

The fire was reported about 5:30 a.m. Monday near SW 15 and Barnes. 

The fire appeared to have started on the second floor of a former four-plex. 

No one was inside of the home during the fire, firefighters said. 

Fire officials said about 50 to 65 percent of the house damaged.

Stay with News 9 and News9.com for more information as it becomes available.