Kitchener explosion injuring two kids, two adults deemed criminal: Fire marshal

A firefighter is silhouetted against a full moon as he watches a fire from a ladder truck Monday, May 16, 2011 in Overland Park, Kan. Police say the Office of the Fire Marshal has declared a house explosion in Kitchener criminal in nature. THE CANADIAN PRESS/AP-Charlie Riedel

KITCHENER, Ont. - Police say Ontario's Office of the Fire Marshal has declared a house explosion in Kitchener criminal in nature.

Waterloo Regional Police say the fire marshal made the call after two children and two adults were injured in an explosion inside a home in the city's southwest.

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