An Amber Alert is active for a San Juan teenager who’s been missing since early last night. San Juan police are searching for 17-year-old Arranza Diaz Larraga who vanished at around 6:45 p.m. Larraga was last seen in the 2100 block of Cesar Chavez Road in southeast San Juan. Larraga is 5 feet tall, weighs 115 pounds, and has blond hair with highlights. There is no information on who may have taken the teen. If you have any information, call San Juan police at 223-2400.