VALLEJO (CBS SF) — Forty residents of an apartment complex in downtown Vallejo have been displaced following a three-alarm fire early Saturday morning, according to fire officials.

The blaze was first reported at 12:38 a.m. at the Kimberly Apartments building in the 500 block of Georgia Street, according to Vallejo Fire Department Firefighter Aaron Klauber.

READ MORE: Man Arrested Following Weekend Bar Shooting In Belmont

Multiple callers reported the blaze and a second alarm was issued almost immediately, he said. Firefighters arrived on the scene and saw smoke showing from the second and third floors of the building.

According to Klauber, fire crews located the blaze in a room on the second floor and contained it there. It was declared under control at 1:10 a.m.

Klauber said despite heavy smoke throughout the building, all occupants were able to evacuate safely and no residents or fire crews were injured.

READ MORE: Ready To Restart The Race: Phil Keoghan Talks About The Return Of 'The Amazing Race' After A 19-Month "Pit Stop"

The building is currently uninhabitable, Klauber said, due to a sprinkler activation that resulted in the third floor of the building suffering heavy water damage, smoke damage to the second floor units and residual water damage on the first floor.

The Red Cross is on the scene assisting those that have been displaced. The fire is currently under investigation.

Mutual aid was brought in from the Crockett-Carquinez, American Canyon, Fairfield and Benicia fire departments.

MORE NEWS: COVID: Testing In Contra Costa County Nearly Double Pandemic Peak During Omicron Surge

© Copyright 2018 CBS Broadcasting Inc. and Bay City News. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed