Firefighters mounted an aggressive attack to extinguish a blaze that broke out in a seven-story building on the UCLA campus in Westwood early Tuesday, according to the Los Angeles Fire Department. The fire was reported around 1:30 a.m. on the third floor of Building 48A - which is where the university's School of Dentistry is located - on Tiverton Avenue near Charles E. Young Drive. Fire officials had initially estimated that 115 firefighters battled the blaze and extinguished it by 2:15 a.m.