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

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.