Six people, including mothers and her daughter, who died in a small plane crash in Philadelphia, were determined by a company run by a medical transport aircraft.
At the time of the catastrophe, the seventh victim, which was not named, was on the ground.
Philadelphia Mayor Cerel Parker announced on Sunday that the number of injuries increased to 22 and five people were still in the hospital and three of them in critical condition.
Investigators have not yet been able to find the black box of the plane, which could give clues to the cause of the accident, officials said.
