The U.S. transportation secretary has visited the site of a medical transportation plane crash in Philadelphia with city and state officials.

The plane had been on a medical transportation mission to Mexico, carrying a child patient, her mother and four crew members.

The victims killed in a medical jet crash in Northeast Philadelphia​ were identified by Jet Rescue Air Ambulance, the Mexico-based company​ operating the small plane.

NTSB investigators found the Learjet 55's cockpit voice recorder Sunday. The agency said it was 8 feet down at the site of initial impact. The death toll is 7, with 22 injured.

A Philadelphia father is calling his son a “superhero” for shielding his younger sister when a medevac jet crashed in a Philadelphia neighborhood, showering flames and debris on homes and the vehicle in which the family was riding.