Israeli tanks moved into the occupied West Bank on Sunday for the first time in decades in what Palestinian authorities called a “dangerous escalation,” after the defense minister said troops will remain in parts of the territory for a year and tens of thousands of Palestinians who have fled cannot return.

Israel’s defense minister, Israel Katz, said that 40,000 Palestinian residents displaced from militant hotbeds would not be allowed to return to their homes.

The six Israelis were the last living captives set to be released in the first phase of the cease-fire. The agreement, strained for weeks, has an uncertain future.

Latest news as six hostages were released as part of the Israel-Hamas ceasefire deal but Palestinian detainees and prisoners were not.

Human remains returned to Israel by Hamas on Friday have been confirmed as those of former hostage Shiri Bibas, according to a statement from her family provided Saturday by the hostage relatives’ forum.