Investigators are planning to announce the results of a criminal investigation into an explosion that leveled a city block and killed a firefighter in southern Wisconsin.

Sun Prairie police have scheduled a news conference Thursday to reveal the findings.

Firefighter Cory Barr was killed in the July 10 explosion that destroyed a bar he owned, five other businesses and a home in Sun Prairie, a city about 15 miles (24 kilometers) northeast of Madison. Several other emergency workers were hurt.

The explosion occurred after a subcontractor installing fiber communication lines struck a gas main. The gas ignited, sending a towering fireball into the night sky.

Court documents show a utility-location worker failed to properly mark a natural gas line prior to the explosion. The search warrant request showed investigators were looking for evidence to support a homicide charge in the case.

Source: The Associated Press

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