The laboratory was filled with explosives, raw material for preparing terror blasts, rockets, mortar shells and three suicide belts ready for use.
The discovery confirmed concerns that Arabs are preparing to launch attacks in Samaria as they have done for years in Gaza.
The government's proposal to dismantle 25 Jewish communities includes four in northern Samaria. If the Knesset approves expelling Jewish civilians and withdrawing IDF troops, the Palestinian Administration would be left in control of a large contiguous area stretching west within striking distance of Tel Aviv and east to the area of Maaleh Gilboa, near Bet She'an and the Jordan Valley.
The plan also calls for withdrawal of Israeli civilians and soldiers from north of Jenin, often called the "terror capital" of Israel, and would leave the PA within striking distance of Afula.