Palestinian families are facing another wave of displacement as yellow concrete markers defining Israel’s military-controlled zone are moved deeper into several parts of the Gaza Strip.

In Gaza City’s Zeitoun neighborhood, Assem Dawla and his family gathered their remaining possessions and loaded them onto a cart as the markers approached the area where they had been sheltering.

Dawla said this was the seventh or eighth time his family had been forced to move since the war began. Continued military activity and Israeli evacuation warnings, he explained, had made remaining in the area increasingly dangerous.

Residents and Hamas officials reported recent changes to the line in Zeitoun, Tuffah and Shejaia in Gaza City, as well as Deir al-Balah, Khan Younis and northern Rafah.

Some residents said they received evacuation warnings through text messages or loudspeakers mounted on drones before leaving their homes and temporary shelters with only essential belongings.

The “Yellow Line” was established under the U.S.-brokered ceasefire agreement announced in October. The wider plan called for increased humanitarian assistance, an Israeli military withdrawal, the deployment of an international force, Palestinian civilian administration and the disarmament of Hamas. Progress on those provisions has since stalled.

By late April, Israel effectively controlled an estimated 64 percent of Gaza. Prime Minister Benjamin Netanyahu later said Israel intended to expand the area under its control to 70 percent of the territory.

Nearly two million Palestinians are now concentrated within a narrow coastal area, where many live in damaged buildings or temporary shelters amid severe humanitarian conditions.

The Israeli military says its deployment is intended to prevent attacks and that the line is marked clearly to reduce contact between civilians and soldiers. It also cites physical barriers, intelligence capabilities and other security measures operating in the area.

Residents, however, say the advancing markers are forcing families to abandon one shelter after another, often only days or weeks after rebuilding temporary living spaces.

The United Nations Office for the Coordination of Humanitarian Affairs said a July evacuation order in Zeitoun forced 30 families to leave their tents, which residents said were subsequently destroyed.

Families are once again carrying blankets, cooking pots, school bags and other surviving possessions through streets filled with rubble, beginning another journey without knowing where they will be able to stay.