Border policemen on Tuesday evening arrested a youth from Nablus in possession of a knife on Rehov Hagai in Jerusalem's Old City.
The youth said that he had acquired the knife and intended to stab Jews to avenge the recent killing of three al-Aksa Martyrs' Brigade men by IDF forces in Nablus.
Border Police Cmdr. Israel Yitzhak said the officers' "alertness and professionalism prevented a terrorist attack and saved lives."
The youth was transferred for interrogation.