A woman opened fire at YouTube’s headquarters near San Francisco on Tuesday, wounding three people before taking her own life as employees of the Silicon Valley technology company fled into the surrounding streets, authorities said. Police did not release any further information on the suspect or her motives for the shooting rampage at YouTube, a video sharing service owned by Alphabet Inc’s Google. A YouTube product manager, Todd Sherman, described on Twitter hearing people running, first thinking it was an earthquake before he was told that a person had a gun.