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.

An investigator with the National Transportation Safety Board, Eliott Simpson, said the plane left Fullerton Airport at 1:35 p.m. It traveled about 10 miles and had climbed to about 7,800 feet, he said, before making a “rapid descent” into Yorba Linda, a sleepy suburban city 10 miles northeast of Disneyland.

On Monday, the authorities identified the pilot as Antonio Pastini, 75, of Gardnerville, Nev. — a retired Chicago police officer. They did not release the names of the four other people who were killed or disclose the exact cause of their deaths.