Investigators have also located the aircraft's black box, CBS reports. It could provide clues into the cause of the crash.

All six people aboard the plane − a pilot and copilot, two medical personnel, a patient and her mother − died in the crash Friday.

A medical transport jet carrying a child patient, her mother and four others slammed into a Philadelphia neighborhood and exploded in flames. The child had been treated in Philadelphia for a life-threatening condition and was being transported home to Mexico,

A Mexican-registered air ambulance crashed Friday evening near Roosevelt Boulevard in Northeast Philadelphia. The aircraft, a Bombardier Learjet 55 operated by Jet Rescue Air Ambulance, had just taken off from Northeast Philadelphia Airport when it went down.

A medical transport jet carrying six people, including a child patient, crashed in Northeast Philadelphia shortly after taking off.

A small medical transport jet carrying a child and her mother along with four other people was in the air for less than a minute after taking off from Northeast Philadelphia Airport before coming down in a fiery "high-impact" crash near a busy mall on Friday evening.

It could be days — or more — until authorities are able to confirm the number of dead and injured, said Adam Thiel, the city's managing director. As of Saturday morning, officials confirmed seven dead — six on the jet, one person on the ground — and 19 injured.

As of Saturday morning, officials confirmed seven dead — six on the jet, one person on the ground — and 19 injured.