Israeli forces, early Wednesday, launched a large-scale arrest campaign in various parts of the West Bank, during which they arrested 21 Palestinians. A statement by the Palestinian Prisoners Society said that the Israeli army broke into various areas in the cities of Jenin, Nablus, Tulkarem, Al-Bireh and Ramallah and the towns of Shu'fat and 'Isawiya in East Jerusalem (AlQuds) and arrested the Palestinians on the ground that they were wanted by authorities.