BURIEN, Wash. — A fast-moving fire gutted an apartment complex in suburban Seattle early Sunday, killing three people, injuring six others and displacing about 50 residents.

The fire started after midnight and left one two-story building gutted and another heavily damaged, King County fire spokesman Dave Nelson said. The cause was under investigation.

"It was horrible," said Melissa Frank, who witnessed the blaze. "The whole building just looked like every corner was on fire. You could hear the glass breaking, the people screaming."

The injured, suffering from cuts and smoke inhalation, included a teenage girl who jumped from a second-story window. They were taken to hospitals.

About 50 people were displaced by the blaze in Burien, about 10 miles south of Seattle.

Fire crews arrived to find smoke pouring from the front of the building, Nelson said.

"The streets were just filled with people running and screaming ... and the apartment was in flames," said Lisa Johnson, a resident who escaped with her granddaughter.

Five people, including a baby, were rescued when Kenneth Mason, who lives nearby, said a friend threw a brick through a glass door that was jammed shut.

"My friend Sam grabbed a big old brick and went and busted the glass door," Mason said. "And they threw the baby out — and then the fire really got bad."

A damage estimate was not available.