A 13-year-old Palestinian boy was arrested by police in Jerusalem's Old City after he was alleged to have been carrying a knife, Army Radio reported on Friday. The boy aroused the suspicions of nearby security forces, prompting them to accost him and perform a search. It was at this point that a knife was allegedly discovered, Army Radio said. The boy, a resident of the east Jerusalem quarter of Beit Hanina, was detained for further questioning.