A medical transport plane crashed and caught fire Tuesday on the Navajo Nation in northern Arizona, killing four people, the tribe said in a statement. The Beechcraft King Air 300 took off from Albuquerque,

A small medical transport plane crashed and caught fire Tuesday on the Navajo Nation in northern Arizona, killing all four people on board, the tribe said.

The plane was landing at Chinle Municipal Airport in the Navajo Nation in Arizona to pick up a patient for a medical transfer. It was not immediately clear what had caused the crash.