Updated

Authorities say two small planes collided and then crashed in the desert north of Phoenix on Friday, killingall four people aboard the two aircraft.

Phoenix and Daisy Mountain Fire Department officials said the collision and crash involved two single-engine planes with two people in each aircraft.

An initial report said three people were killed and two people were injured. Fire officials with the Peoria Fire Department and Daisy Mountain Fire Department later announced four people had died and there were no survivors.

Television news footage showed only charred wreckage left from one of the planes, while the other was fairly intact.

A Federal Aviation Administration spokesman says the National Transportation Safety Board and the FAA will investigate.

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