YORBA LINDA, CA — The pilot who died when his small plane crashed into a Yorba Linda home was identified as a retired Chicago police officer, investigators said Monday.

Antonio Pastini, 75, was flying the aircraft out of Fullerton Municipal Airport on Sunday afternoon when it made a sudden decline 10-minutes after takeoff, said National Transportation Safety Board Investigator Eliott Simpson.

Radar data indicated that the plane made a left turn and climbed to 7,800 feet, according to Simpson. Witnesses on the ground say the plane “nose-dived” to the ground, and saw the plane’s wings fall off before it struck the ground, NTSB investigator Maja Smith said. Other parts of the aircraft landed across the neighborhood until the 1981 Cessna careened into the home on the 19000 block of Crestknoll Drive.

“Along with the pilot, four individuals died inside the home, two males and two females,” Orange County Sheriff’s Department Carrie Braun said. They have not yet been positively identified.

The Orange County Coroner’s Office is working to positively identify the dead and notify next of kin, she said.

Yorba Linda Plane Crash Sparks House Fire, Kills 5 People: Photos

More than 70 firefighters arrived to battle the home, engulfed in flames. Orange County Fire Authority, Anaheim Fire and Orange Fire Departments responded to the blaze which took several hours to bring under control. One firefighter suffered an ankle injury, according to OCFA Capt. Cameron Rossman.

The National Transportation and Safety Board continues to investigate the cause of the crash, and a preliminary report was estimated to be released within two weeks. The investigation could take up to one year to complete, they said.

Nearby Glenknoll Elementary School was closed Monday during the investigation.

Pastini was the owner of a Carson City, Nevada sushi bar and bestaurant, City News Service has said.

OCFA Photo