Jet Rescue Air Ambulance said it was unlikely anyone on board survived the Friday crash. Nineteen people on the ground were injured, Philadelphia Mayor Cherelle Parker said.

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.

The identities of several of the people onboard the small plane crash in Philadelphia, on Friday, Jan. 31, including the aircraft’s pilot and co-pilot and a doctor onboard, have been identified by local outlets and organizations in Mexico.