A twin-engine medevac jet crashed in a neighborhood in northeast Philadelphia Friday night, causing a fiery explosion, according to authorities and video from the scene.

A young girl diagnosed with a life-threatening condition was one of six people aboard a doomed air ambulance that went down in Philadelphia on Friday.

A medical transport jet with a child patient, her mother and four others aboard crashed into a Philadelphia neighborhood shortly after takeoff Friday evening, exploding in a fireball that engulfed several homes.