Mary Jan Gieling was last seen on Friday at about 1 p.m. at her school wearing blue jeans and a black sweater. Her family has not heard from her since then.
Gieling's relatives said they did not notice any unusual behaviors or arguments before the teen's disappearance. They believe she may have been in contact with a male for several weeks, but they don't know who he is.
If you have any information regarding Gieling's whereabouts, you're urged to contact Riverside police at (951) 353-7107.