A fire displaced people from three residences in San Bruno early Tuesday morning, a fire battalion chief said.
The blaze was reported around 1:30 a.m. in the 900 block of Montgomery Avenue.
The fire affected a duplex and an adjacent single-family home, according to Battalion Chief Ron Lavezzo.
Lavezzo said firefighters eventually extinguished the blaze, but not until after it caused “quite a bit” of damage to the homes.
No one was injured in the fire but it has displaced more than a dozen people from the residences, he said.
The cause of the fire remains under investigation.