LOS ANGELES (CBSLA) – A massive structure fire tore through a commercial building Monday in the Glassell Park area.

About 150 firefighters were dispatched to battle the fire burning at the two-story building in the 3500 block of North San Fernando Road, said Amy Bastman of the Los Angeles Fire Department.

READ MORE: Lance Cpl. Kareem Nikoui, 1 Of 13 Service Members Killed In Kabul Suicide Bomb Attack, Memorialized At Riverside Church

Flames could be seen burning through the building’s roof just before 6 p.m.

CBSLA’s Jeff Nguyen reported Monday night that fire crews were concerned that a wall next to a power pole would collapse. Earlier a number of power lines clipped and fell onto the building.

READ MORE: George W. Bush To Speak in Beverly Hills, Long Beach

The building is a party supply rental business.

There were a number of people inside. Luckily all of them got out safely.

There was also concern that the fire could spread to a medical supply business next door where there is a number of oxygen tanks.

The cause of the fire is under investigation.

MORE NEWS: Biker With Several Felony Warrants Arrested In Westminster

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. City News Service contributed to this report.)