SEAL BEACH, Calif. (AP) — A fire at a coastal Southern California apartment building Monday injured two people and displaced dozens more, authorities said.

A candle left burning in a second-story bedroom sparked the fire shortly before 1 a.m. in a two-story complex in Seal Beach, south of Los Angeles, Orange County Fire Authority spokesman Tony Bommarito said.

It took about 40 minutes to douse the fire, which damaged five units, fire officials said.

One apartment was stuffed with items and the hoarding conditions made it difficult for firefighters to enter, according to fire officials.

Two people were treated for minor injuries at a hospital and more than 20 adults and at least 13 children were displaced, according to the Fire Authority.

The cause of the blaze was under investigation.