Fire officials say an explosion that leveled a home in Omaha, Nebraska, has left two people dead and two others critically injured. Omaha Fire Department Battalion Chief Scott Fitzpatrick says firefighters responded to the explosion shortly after 8 a.m. Tuesday. Fitzpatrick says the house was leveled and completely destroyed. The explosion also caused significant damage to homes on either side of the house. The blast in south-central Omaha rained splintered lumber and other debris throughout the neighborhood, and witnesses say it was felt and heard miles away. The cause wasn't immediately released.