(CNN) -- Three people, including a child, died Sunday when their helicopter crashed about 35 miles north of Phoenix, Arizona, a Federal Aviation Administration spokesman said.
Investigators had yet to determine the cause of the crash, FAA spokesman Ian Gregor told CNN.
The Eurocopter EC135 went down at about 3 p.m. local time just west of the Tonto National Forest in Cave Creek, Arizona, and subsequently burst into flames, Gregor said.
FAA agents were headed to the scene, and a National Transportation Safety Board investigator was scheduled to arrive Monday, he said.
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