San Bruno (California), April 4: A woman with a handgun opened fire at YouTube’s headquarters in the US state of California, shooting three people before killing herself, authorities said. The incident took place on Tuesday and the San Bruno Police Department identified the female attacker as 39-year-old sim jafi Aghdam, a Californian resident of Iranian descent, the US media reported. The motivation for the shootings was under investigation, police said, although her social media postings included criticisms of YouTube. The violence began about 12.45 p.m. in a courtyard outside the company’s headquarters, south of San Francisco. Witnesses described seeing a woman shooting a gun in the courtyard as others ran for their lives.