A firefighter was killed and at least seven more people were injured when a building in Maine housing a center for people with disabilities exploded Monday morning.

The Farmington Fire Department responded a call about a "gas smell" at the administrative building for Life Enrichment Advancing People (LEAP), an organization that helps disadvantaged and disabled adults, just after 8 a.m., according to a statement from the Farmington Police Department.

"Upon arrival and while investigating the scene, the building exploded," the statement said.

One firefighter was killed, and seven other people, including four firefighters, a LEAP maintenance worker and a NorthStar ambulance employee, were injured, according to police. The extent of the injuries was not immediately known.