Boston Post Road was closed briefly in West Haven after the owner of an antique store found a mortar at the shop Tuesday afternoon, according to police.
Police said the owner of Atlantis Antiques on 1004 Boston Post Road contacted authorities shortly after 4 p.m. to report the discovery.
West Haven police and New Haven police explosive technicians responded to the store and removed the mortar to be destroyed, according to police.
The road was closed between Tuthill and Jaffrey streets and drivers were asked to avoid the area due to heavy traffic. Police have since reopened Boston Post Road and said the area is safe.