Rockford home explosion under investigation

May 20, 2011 3:55:45 PM PDT
Investigators are trying to determine what caused a house in Rockford to explode.

The homeowner had been there Thursday cleaning so it could be rented. He said he was thankful the house was vacant.

Firefighters think the blast may have been caused by a natural gas line break because they smelled gas when they arrived. No one was hurt.