The Kfir Brigade, as well as undercover units and Border Police officers, on Thursday night carried out counterterror operations in Jenin.
During the operation, five terrorists were eliminated and eight wanted suspects were arrested.
The forces also discovered explosives placed in the ground by terrorists, including beneath roads.
No IDF forces were injured.
Arab reports say that one of the eliminated terrorists is Baha al-Lahlouh, one of the leaders of the Islamic Jihad terror group's Jenin branch.
During the operation, some of the suspects attempted to escape into Jenin's hospital by ambulance. The forces surrounded the hospital and conducted searches, during which the terrorists were arrested.
Since the start of the war in Gaza, the IDF has conducted six widescale operations in Jenin to thwart terror activities. During the previous operation, 12 terrorists were eliminated, 20 were arrested, and an underground tunnel shaft containing ready-to-use explosives was destroyed.
Also on Friday, the IDF arrested a terrorist at the entrance to Jenin's Ibn Sina hospital, and confiscated three M-16s. Prior to his arrest, the terrorist had attempted to hide in the hospital.