Two civilians and two firefighters were injured Friday after a furnace explosion led to a 4-alarm industrial fire in Ayer, Massachusetts.
Fire crews from Ayer and other nearby communities responded to Fitchburg Road.
Two civilians sustained non-life-threatening injuries. A medical helicopter was called for one of the victims. Two firefighters also suffered from minor injuries.
Route 2A was closed between Groton School Road and Groton Shirley Road. Drivers are advised to seek an alternate route.