Office Building, Other Business Fire at commercial building extinguished by sprinklers (Allentown, PA) May 22, 2014 viking210 A fire erupted on the second and third floor of a commercial building on Wednesday morning. The building’s fire sprinkler activated and suppressed the fire. The fire department spokesman credited the fire sprinkler system for the minimized damage to the building; there were no injuries. The cause of the fire is under investigation.