A construction company has pleaded guilty to charges in connection with an explosion that killed seven people in an Etobicoke strip mall three years ago.

Warren Bitulithic Limited was ordered to pay a fine of $225,000 with a 25 per cent victim surcharge of $56,250 under the Provincial Offences Act for its part in the incident.

On April 24, 2003, the company's construction workers ruptured a gas line, sparking a massive explosion that levelled the two-storey building on Bloor Street West near Kipling Avenue.

Four storefronts and residential apartments in the mall were destroyed, and the blast tore a hole in the side of a nearby home.

The company faced charges of digging without determining the exact location of an underground gas line and damaging an underground natural gas pipeline without permission.

Ontario's fuel safety agency, Technical Standards and Safety Authority, laid the charges, which are not criminal in nature.

The agency called it the largest fine in their history imposed by the courts.

Warren Bitulithic was one of three companies charged in the explosion.

Enbridge Gas and a subcontractor, Precision Utility Ltd., were charged with failing to provide accurate information about the location of the natural gas pipelines. Their trial continues.

With files from Canadian Press