The Santa Clara County Sheriff's Office is responding to an active shooter investigation in the San Jose area. The sheriff's office said in tweet just after 8 a.m. that the "shooter is down." Sign up for our Newsletters The events unfolded in the area of a light rail yard near Interstate 880 and Norman Mineta San Jose International Airport. KCRA 3 has not yet confirmed information about injuries or deaths. This is a developing story. Stay with.