CHEYENNE, WYO. (AP) – An air and ground search is under way in southeast Wyoming for a single-engine plane carrying four people. Jeanne Stone-Hunter of the Wyoming Civil Air Patrol says the Piper PA-32 aircraft was reported missing after it failed to land as scheduled Tuesday evening at Casper/Natrona County International Airport. She says searchers are concentrating their efforts on the Laramie Mountains between Casper and Cheyenne. An initial search of the area Monday night by a Civil Air Patrol plane found no emergency beacon signals. Stone-Hunter says the flight originated in Harrison County, Texas and stopped in Dodge City, Kansas to refuel.