VISALIA, Calif. (AP) — Four people killed in the weekend crash of a small plane in central California have been identified as members of the same family.

The single-engine Beechcraft Bonanza crashed in heavy fog Saturday shortly after takeoff from Visalia Municipal Airport. Everyone on board died. The Tulare County Sheriff’s Office says the victims were a 78-year-old Sacramento man, along with his two daughters and nephew. Officials haven’t said if weather was a factor in the crash.

The Federal Aviation Administration and the National Transportation Safety Board are investigating.