Grocery Store / Super Center, Retail Sprinkler system aids firefighters in suspicious fire at grocery store (Phoenix, AZ) October 30, 2013 viking210 Three separate fire appear to have been intentionally in a grocery store at about 8 p.m. on Monday, October 28. The sprinklers in the building were activated by the heat from the fire and kept the fire from spreading. Investigators are calling the fire suspicious, and the investigation remains ongoing. No injuries were reported.