Israeli operations in the West Bank have killed at least 12 Palestinians since Tuesday and could threaten the newly agreed ceasefire in Gaza, United Nations Human Rights office spokesperson Thameen Al-Kheetan said on Friday.

In the days since a fragile ceasefire took hold in the Gaza Strip, Israel has launched a major military operation in the occupied West Bank and suspected Jewish settlers have rampaged through two Palestinian towns.

Dozens of people were killed or wounded after an outbreak of violence in the West Bank that Israeli military officials called a counterterrorism operation.

Israel’s defense minister has announced a series of raids that he says are targeting “terrorism” in the occupied West Bank, as Palestinian officials warned of a “man-made disaster.”

As Israel withdraws some of its troops from Gaza during a cease-fire there, it has turned attention to another Palestinian territory — in particular a city with a history of militant activity.

Israel launched a major military operation Tuesday in the occupied West Bank city of Jenin that killed at least nine Palestinians and left at least 40 more people wounded, Palestinian health officials said,

The Israeli military killed at least seven Palestinians in the occupied West Bank on Tuesday as the prime minister announced the start of a “large-scale military operation” in the restive city of Jenin.

JERUSALEM/JENIN (Reuters) -Israel's defence minister said on Wednesday forces were applying lessons learned in Gaza as a major operation continued in Jenin, which the military said was aimed at countering Iranian-backed militant groups in the volatile West Bank city.