(Beaverton, OR) -- Police in Washington County are searching for a missing and endangered teenage girl. The Washington County Sheriff's Office says 16-year-old Emmeline Tesch went missing just before noon Friday near Ridgewood View Park in Beaverton. Police say she was last seen getting off a MAX train at the Oregon Zoo stop. Officials say she's "medically fragile and in grave danger." Anyone with information is urged to contact police.