The photograph was taken outside the high school where the two are students.
The young couple are being held in the juvenile detention centre in Nador, where a sit-in has begun to demand their release, Khayari said.
The incident has caused such a stir among young people that a number of other couples have posted similar photos on their Facebook pages.
A local official contacted by this news agency confirmed the arrests, but declined to comment.
Khayari said the pair are to appear before a juvenile court judge next Friday.