At 4:04 a.m. Tuesday morning, LAFD responded to a reported structure fire in the 4600 block of Fountain Avenue. Firefighters arriving located a two-story strip mall with a hookah lounge on the second story, well involved with fire. The fire spread through the attic destroying several other units on the second floor. Firefighters were still working to achieve knock down approximately 30 minutes later. Several explosions were heard from the building, although the cause is currently unknown. The cause of the fire is under investigation and no injuries have been reported at this time.