RILEY, Kan. (AP) — Authorities say a Kansas house explosion has injured a woman and three children. KSNT-TV reports that the blast happened Saturday afternoon in the town of Riley. Riley County Fire Chief Pat Collins says the explosion caused the garage door to fly out into the street, and started a large fire that destroyed the home, garage and a vehicle. Four people were taken to a hospital. The extent of their injuries wasn't immediately known. The cause of the explosion remains under investigation.