GENE RANDALL, CNN ANCHOR: The quiet of a Sunday morning on Chicago's South Side was shattered by a house explosion today. Six people were injured, two elderly couple are listed in critical condition. We have a report from Ben Bradley (ph) at CNN affiliate Chicagoland Television.</s>BEN BRADLEY, CLTV REPORTER: Now that the fire is out and the smoke has cleared, the force of this explosion is apparent. Items that were inside this house are now clear across the street. Yarn hangs from trees 2x4s litter the street. One piece of plywood is stuck in a neighbor's house.</s>KATHY TRENTER, GARFIELD RIDGE RESIDENT: I came out here and there was paper flying everywhere, and people were running out of the church. And it was crazy. It was really scary.</s>BRADLEY: Seconds after the explosion woke up this neighborhood, several neighbors rushed inside, pulling an elderly couple out of their home. Across the street, Sunday Mass was just letting out. Doors to the church school are bent inward.</s>JAMES JOYCE, CHICAGO FIRE COMMISSIONER: If those kids were lined up in front of that school shortly after 8:00, this would have been a tragedy of a different degree than it is now.</s>BRADLEY: Chicago's fire commissioner says bomb and arson investigators are just beginning to sift through rubble to search for a cause. But People's Energy says their preliminary investigation suggests natural gas may not be the culprit. There appears to be more burning than there would have been with natural gas.</s>RANDALL: Late reports say the two people in critical condition have life-threatening injuries.
House Explosion Rocks Chicago Neighborhood