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.

As many as 600 people were held in a hospital overnight, the mayor of the city of Jenin told a Palestinian news agency. The death toll from the two-day operation rose to 10, officials said.

Israel’s military is using lessons from the Gaza war in its new West Bank operation to ensure “terrorism does not return,” according to Defense Minister Israel Katz.