Philadelphia Police say someone threw an explosive inside a house on the 6800 block of Vandike Street in Northeast Philadelphia. Investigators say it may have been tossed through a window.
A 42-year-old man was inside the house at the time and suffered severe burns. Police say he was burned on his face, torso and arms and is in critical condition at Aria Torresdale Hospital.
The fire is under investigation. There's no word on what type of explosive was used.