Deputy Chief Richard Coulombe of the Rumford Fire Department, right, watches as Mexico firefighters don air packs and breathing equipment to assist Rumford Lt. Keith Bickford in the basement of the former bar Jack’s Place, right, at 137 Rumford Ave. at about 12:20 p.m. Wednesday. A third-floor tenant called 911 to report a fire alarm activation and the odor of gas in the basement. Coulombe said their meters didn’t detect any gas. He said he believes dust or moisture from a working clothes dryer that wasn’t vented outside, set off the alarm that was mounted over the dryer. Six Mexico firefighters responded to a call for manpower after none responded from Rumford to the first call for extra help.