Amanda Condie with Stittco Energy says the explosion occurred at the company's propane facility just before 7 a.m. Wednesday in Flin Flon.
She says one person was injured and taken to hospital with non-life threatening injuries.
Condie says the fire was quickly extinguished but levelled an out-building at the facility.
She says the explosion is not considered suspicious and the company will be co-operating with investigators from the Office of the Fire Commissioner.
A few businesses surrounding the area were evacuated after the blast.
"Our first concern is for the safety of the community, our employees and any others who may have been affected," Condie said. "We're certainly co-operating with local first responders."