Police arrested a 13-and-a-half year-old Arab in Jerusalem Sunday morning.
When police searched the boy's room at a therapeutic-educational institution in northern Jerusalem, they found two cartridges, a gun, and a holster.
The police searched the teen's room after they received a tip that a suspect was concealing weapons at the location.
The minor, a resident of the eastern part of Jerusalem, has been brought in for questioning. His arrest has been extended.