Four people were killed Tuesday when a medical transport plane crashed on Navajo Nation land in Arizona, according to tribal police.

A medical transport plane crashed and caught fire Tuesday afternoon on the Navajo Nation in northern Arizona, killing all four passengers, officials said. The crash occurred around 12:40pm, near the Chinle Municipal Airport, as the group was en route to pick up a patient.

CHINLE, Ariz. (AP) — Four people died Tuesday when a medical transport plane crashed and caught fire on the Navajo Nation in northern Arizona, the tribe said in a statement.