Six people were injured after a massive fire broke out early Friday at an apartment building in Chinatown and spread to a nearby structure, the Los Angeles Fire Department said.

The fire erupted shortly after 4 a.m. at a three-story building in the 800 block of North Bunker Hill Avenue, officials said. The fire was believed to have started by homeless encampments.

"There have been several fires at this structure here. And they come out and they put it out, the police chase the homeless out, but they keep coming back. So this time, they set it good," said resident Ken Ferris.

Video from AIR7 showed dramatic flames spewing from the upper floors of an adjacent building and through the roof after the fire engulfed the original building.