Crews were responding to a large house fire in North Hills Friday night.

Officials were called shortly before 9 p.m. about the fire in the 15900 block of West Napa Street, the Los Angeles Fire Department said in an alert.

There was heavy smoke and flames pouring from the one-story home in aerial video from Sky5.

Fire officials said the flames spread to the outside of a neighboring building that serves as a board-and-care home. One person inside couldn’t stand without assistance and sheltered in place, while two others evacuated.

Firefighters were able to extinguish the flames before anyone was hurt, but four occupants will be displaced, authorities said.

Firefighters say they also had to navigate around downed wires and a small amount of ammunition discovered inside.

Thirty firefighters were able to fully put out the flames in about 23 minutes, LAFD said.

The fire’s cause was under investigation.