YARMOUTH — The Federal Bureau of Investigation is offering an undisclosed reward for help in identifying two men involved in the burglary of a Hannaford pharmacy in December.

Yarmouth police Detective Paul Martin said he believes the burglar had an accomplice who helped surveil the store before the crime. Police believe this second man walks with a limp and wears a brace on his left leg, Martin said.

The burglary suspect, whose image was captured on surveillance video at the Route 1 store Dec. 19, was dressed in black and wore gloves and a mask, and stole a litany of narcotics, Martin said.

Less than a week later, on Dec. 24, a man walked into the Rite Aid pharmacy on Route 1 and demanded narcotics. Martin said he does not believe the incidents are related.