At least five households, including a man who was taken to a hospital in critical condition, were displaced by a Fitchburg house explosion Thursday night.
On Friday morning representatives from local, state and federal agencies were continuing to investigate the explosion, the Fitchburg police and fire departments said in a joint statement at about 9:45 a.m.
Fitchburg Fire Chief Joe Pulvermacher said in a live interview with WISC-TV that he expected the investigation to culminate by the end of the day Friday. "We're trying to determine what caused this and how we can prevent this from happening in the future," Pulvermacher said.
The ongoing investigation has found no evidence of a leak or explosion in the underground gas distribution system, said Steve Schultz, a spokesman for Madison Gas & Electric.
MGE did not receive any calls for a gas leak prior to the explosion and the company's first responders were on the scene within 10 minutes to shut off gas to the residence, Schultz said.