Firefighters battled a blaze at a condo complex in Westminster Monday morning. The fire began around 4:50 a.m. the 9400 block of Willowbrook, near Bushard Street and Bolsa Avenue. The Orange County Fire Authority, Huntington Beach Fire and Garden Grove Fire all worked on the blaze. Firefighters ventilated the roof to release smoke and hot gases. The fire was mostly knocked down after about an hour. Three units were heavily damaged by the fire, and a fourth sustained more minor damage, according to the O.C. Fire Authority.