(AP) — Searchers in central Utah are looking for a missing plane from Gillette, Wyo.

The plane disappeared from radar on Sunday shortly after making a refueling stop in Fillmore, Utah. It was enroute from Bakersfield, Calif. back to Gillette with two unidentified passengers and a pilot on board.

According to the Associated Press, four planes helped search for the missing plane around Fillmore on Tuesday. A ground search was also planned.

The wing chaplain of the Civil Air Patrol in Utah, Stu Boyd, said no emergency locator signals from the plane have been detected.