Israel launched a large-scale military operation in the occupied West Bank on Wednesday, where its forces killed at least nine Palestinians and sealed off the volatile city of Jenin, according to Palestinian officials.

Lt. Col. Nadav Shoshani, an Israeli military spokesman, said that “large forces” had entered the volatile city of Jenin, which has long been a militant stronghold, as well as Tulkarem and the Al-Faraa refugee camp dating back to the 1948 Mideast war, all in the northern West Bank.