Christopher Boisvert, of Winchester, NH, was arrested at his home on charges of armed robbery while masked and assault with a dangerous weapon, Winchendon police said.
Investigators said he robbed the Mike Mart on Spring Street on Jan. 1. Police began to look into Boisvert after they received a tip about his alleged involvement in the robbery.
Winchendon police are working with investigators in Ashby as Boisvert is a suspect in an armed robbery there the same night, authorities said.
Boisvert is being held in New Hampshire while he awaits extradition to Massachusetts.
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