BERKELEY — Ten families were displaced in a two-alarm fire early Tuesday that damaged two adjacent apartment buildings in West Berkeley, officials said.

Firefighters responding to the 2300 block of Ninth Street about 2:51 a.m. Tuesday found two adjacent two-story apartment buildings on fire and residents self-evacuating, officials said. A second-alarm was called.

The fire was brought under control at 3:36 a.m.

One resident was assessed at the scene for a medical issue but did not require hospitalization, officials said.

No firefighters were injured.

The Red Cross responded to the scene to assist the 10 families that were displaced by the fires, officials said. The exact number of residents was not available.

The cause of the initial fire is under investigation. A damage figure has not been set.