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.
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Route 2A was closed between Groton School Road and Groton Shirley Road. Drivers are advised to seek an alternate route.