Los Angeles police were searching for an arsonist who started six trash can fires on Ventura Boulevard Wednesday night, officials said. One of the fires appeared to have spread to a business at 13912 Ventura Blvd. in Sherman Oaks, police told KNBC-TV, Los Angeles. The series of fires began at 8:40 p.m. in the 13,000 block. Firefighters were at the scene, where smoke was seen billowing from the roof of a building, the TV station said.