About 2,500 National Grid customers were without power in Belchertown and Granby Monday night.
National Grid told CBS 3 a failed piece of equipment on State Street in Granby caused the outage at about 5:15 p.m.
National Grid said they are working to get its customers electricity back and power for customers is slowly being restored.
There is no exact timetable for when all power will be restored.
Stay with CBS 3 for the latest on this developing story.
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