A medical transport jet with six people on board plummeted to the ground near the Roosevelt Mall in Northeast Philadelphia Friday night, bursting into flames that spread to homes and cars in a heavily trafficked area and killing everyone on board the plane and at least one person on the ground.

The Learjet, carrying a pediatric patient and five others, crashed on Friday, killing all on board. On the ground, one person was killed and at least 19 others were injured, officials said.

Emergency crews are responding to an explosion in Northeast Philadelphia after a small plane crashed in the area of Roosevelt Boulevard and Cottman Avenue, according to police.