Firefighters responded to a fire alarm that went off in an office building that was undergoing renovations last Wednesday morning in East Northport. East Northport firefighters responded to Larkfield Plaza, located on the 200-block of Larkfield Road, for the report of smoke coming from a business that led to fire sprinkler activation at 7 a.m. Upon fire crew arrival, the fire had been extinguished by the fire sprinkler system. The cause of the fire is under investigation by the Town of Huntington Fire Marshall’s Office. Fire officials, however, believe the fire started in a plastic container filled with rags soaked in wood staining chemicals that had been used during the renovations. No injuries were reported. About 25 fire and EMS personnel responded to the scene with three engines, two ambulances and a paramedic unit. A Tower Ladder from the Northport Volunteer Fire Department was also called to the scene for assistance.