Members of the IDF's undercover Duvdevan Unit killed five and arrested one terrorist in Tammun as part of the hunt for the terrorist responsible for killing Tzeela Gez, the military confirmed.
IDF forces are continuing the search for the terrorist responsible, the military added.
Palestinian Islamic Jihad issued a statement claiming that five of its members were killed while clashing with the IDF in Tammun.
The IDF also fired shoulder-mounted rockets towards a building where terrorists had barricaded themselves inside, the military stated.
During searches, the IDF found three M-16 rifles and four vests.
Simultaneously, Border Police special forces arrested three armed terrorists in Tubas and seized six M16 rifles, a pistol, a grenade, and additional combat equipment, the military added.
Further, explosive charges were found in the building where terrorists were hiding, the military confirmed.
An unidentified security source told Walla that the terrorist knew the area well, planned the escape in advance, and may have acted with assistance from others.
Searches are being carried out using personnel deployed to the area overnight, in parallel with proactive roadblocks and checking suspects, an IDF spokesperson added.
Protection of the settlements in the area has also been increased, reports noted, adding that similar activity is being carried out in other villages in the northern West Bank to rule out the possibility that the terrorist fled there.
What happened in the terror attack?
This follows a pregnant woman being killed in a terror attack in the West Bank on Wednesday night.
The victim was later identified as 30-year-old Tzeela Gez, who was on her way to deliver her fourth child.