These were people who dedicated their lives to saving others, and their loss is felt deeply across the Navajo Nation,” Buu Nygren, the Navajo Nation president, wrote in a statement.

Four people were killed when the medical transport plane they were in crashed at an airport in the Navajo Nation in Arizona, police said. The dual-propeller Beechcraft 300 crashed Tuesday as it was landing at Chinle Municipal Airport in the eastern part of the state, police and the Federal Aviation Administration said.