An explosion and fire at a Colorado Springs home that sent two people to the hospital was caused by a leaking gas line in the utility room, the Colorado Springs Fire Department said Thursday.

The two-alarm fire on Friday at 4797 Chaparral Road, north of Barnes Road and Oro Blanco Drive, was ruled accidental.

The fire department said a gas line running into the home's utility room was not properly secured and the valve was open.

Several explosions occurred in the house that shook the neighborhood.

The two residents who ran from the house after the explosions were treated at a hospital and released later that day.

Photo gallery of fire.