KANSAS CITY, Kan. (AP/Post) — Authorities are investigating the crash of a P-51 Mustang that killed two people in Atchison County, Kansas.

The plane crashed around 10:30 a.m. Sunday, one day after it flew in the Amelia Earhart Festival.

The pilot and a passenger both died in the crash. According to the Kansas Highway Patrol crash report, they were identified as 34-year-old Bethany L. Root of Atchison and 64-year-old Vlado Lenoch of Burr Ridge, Illinois.

Root was the manager of the Amelia Earhart Memorial Airport in Atchison.

Lt. Bryce Whelply of the Patrol says the cause of the crash wasn’t immediately clear. He says federal officials will investigate.

The plane crashed about nine miles away from the Amelia Earhart Airport.