Two Ecuadorians and a U.S. citizen were killed when their small aircraft crashed in southwestern Colombia, this nation's air force said Friday.

Air traffic controllers lost contact with the Cessna 206 early Thursday afternoon as the plane was approaching the southwestern city of Cali.

The plane's wreckage was found at a height of roughly 3,000 meters (9,836 ft.) near Lake Calima, the Colombian air force said.

All three people aboard were killed.

The plane, piloted by an unnamed American, took off from Panama City bound for Guayaquil, Ecuador, with a planned stop in Cali for refueling.

Colombian authorities identified the passengers as Walter Campo, former mayor of the Ecuadorian canton of La Concordia, and his wife, Stefania Loor.

The cause of the crash is under investigation. EFE