Israel accused Hamas of violating a fragile ceasefire by changing the order of hostages it has released, stopping thousands of Palestinians from returning to their homes in the northern Gaza Strip on Sunday.

The Oct. 7 cross-border attack led by Hamas killed some 1,200 people, mostly civilians, and took around 250 others hostage. More than 100 were freed in a weeklong truce the following month. Israel believes at least a third of the over 90 captives still in Gaza are dead.

The hostages are the second set to be released since the multiphase agreement came into effect, raising hopes for a lasting end to the war.