A multiple-alarm fire that broke out at a La Puente apartment building overnight on Sunday left three people injured, including one in critical condition, and several families displaced, authorities said.
Flames erupted at the Walnuts Apartments complex in the 15400 block of East Francisquito Avenue shortly before 1:30 a.m., prompting a response from the Los Angeles County firefighters and the L.A. County Sheriff's Department.
When fire crews arrived, they discovered a unit of the building showing flames and smoke. One person had to be rescued from the fully engulfed unit.
That person was in critical condition, according to Supervisor Ed Pickett of the Los Angeles County Fire Department. It was not immediately clear if the victim would survive, he said.
Pickett added that two others suffered minor injuries, including a responding sheriff's deputy.
It took firefighters roughly 20 minutes to extinguish the blaze, during which time the building was evacuated.
A total of four units were directly affected by the fire, and have been red-tagged, according to La Puente City Manager David Carmany. The impacted families were taken to a local school that was being used as an evacuation center.
Carmany said the cause of the blaze has not yet been determined, and remained under investigation.
KTLA's Geoff Peters contributed to this story.