A flight instructor was giving a lesson when heard the radio call the moment before a midair collision that killed two at an airport near Tucson.

Who the victims are. Police have not yet identified the people who were aboard either plane.

Two planes collided midair Wednesday at the Marana Regional Airport near Tucson, Arizona, leaving two passengers dead, the Federal Aviation Administration said.

"This is an unprecedented event, and we are grateful for the swift response from the Marana Police Department and Northwest Fire District.”