The twin-engine Cessna 414A appeared to catch fire and disintegrate in mid-air, witnesses told KTLA-TV, before fiery parts of the aircraft landed on two homes in Yorba Linda.
“The plane blew up about 100 feet off of the ground. The plane blew up in the sky," neighborhood resident Jared Bocachica said.
"I come out ... it's raining plane parts from the sky," Bocachica said. "The plane didn't hit and scatter, it blew up and hit the house."
When emergency responders arrived on the scene, one house was engulfed in flames. The fire also spread to a second home, KTLA reported.
According to The Associated Press, the pilot and four people inside a house died. Three of the victims, including the pilot, were men, and the other two were women.
An investigation is underway by both the FAA and the National Transportation Safety Board.