A small plane crashed into a Southern California home on Sunday, killing five people, injuring two others and spraying debris across several residential blocks that temporarily became a site of chaos. The crash, which occurred around 2 p.m., killed four people inside the Yorba Linda home — two men and two women — as well as the plane’s male pilot, Lt. Cory Martino of the Orange County Sheriff’s Department said at a news conference on Sunday. Officials said the pilot had been the only person on the aircraft; the relationship between the four people inside the home was not clear.