Grocery Store / Super Center, Retail Sprinkler system aids firefighters in grocery store fire set by arsonist (Vallejo, CA) August 16, 2013 viking210 Fire crews responded to a call of a supermarket fire on August 14. When they arrived, the fire had already been extinguished by the store’s fire sprinkler system. Investigators report that an arsonist had attempted to start a paper towel holder on fire. There were no injuries reported.