A Cumberland Farms in Westerly was closed for a period of time on Monday due to a drug-related hazmat situation. Westerly Police Chief Shawn Lacey says officers discovered a white powder that contained fentanyl on the floor of a bathroom, and that someone stepped in it and tracked the substance into the store, prompting the closure so that the cleanup could happen. This was at the Cumbie's on Friendship Street. Police are investigating.