A homemade battery pack on an e-bike was the likely cause of a fire at a 100-unit apartment building in South Friday morning. The fire department was alerted to the fire at 425 Broadway by the building's automatic fire alarm and sprinkler system at 7:37 a.

Residents told Maine's Total Coverage the sprinklers in the building went off, causing water damage on the seventh floor as well as rooms below where the fire was.