Hotel / Restaurant, Restaurant Sprinkler system aids firefighters at restaurant fire (Longmont, CO) April 30, 2014 viking210 Police were alerted to the reports of an intrusion alarm being activated at a restaurant shortly before 4 a.m. Wednesday, April 30. When they arrived, they saw flames inside the building, and fire crews were dispatched. When fire crews entered the building, they found the fire sprinkler system had activated, and the firefighters put out the remaining flames. The fire did not cause any structural damage to the building, and its cause is under investigation. No injuries were reported.