Israel has moved the blocks which are supposed to mark its post-ceasefire line of control deeper into Gaza in several places, sowing confusion among Palestinians.
Satellite images reviewed by BBC Verify show that in at least three areas Israel placed blocks, before returning later and moving the positions further into the Strip.
Under the terms of the US-brokered deal with Hamas, Israel agreed to withdraw troops beyond a line marked in yellow on Israeli military maps, which it has illustrated on the ground with concrete yellow blocks.
Defence Minister Israel Katz warned in October that anyone crossing the Yellow Line would be met with fire.
Since these comments were made, there have been a series of deadly incidents around the line.
In Beit Lahia, Jabalia and al-Tuffah, the Israel Defense Forces (IDF) placed blocks and later returned to move them deeper inside Gaza. In total, 16 positions were moved.
In the al-Tuffah neighborhood of Gaza City, satellite images show that IDF troops moved at least seven already placed blocks between 27 November and 25 December.
The position of the markers were moved on average 295m (968ft) deeper inside the Strip.
As well as the blocks that have been moved, BBC Verify mapped 205 other markers. More than half of those have been placed significantly deeper inside the Strip than the line marked on maps.
An IDF spokesperson said it rejected all claims that the Yellow Line has been moved or its crossing by IDF troops, stating that the IDF is operating to visually mark the Yellow Line in accordance with the conditions on the ground.
Analysis of satellite images suggests that some sections of the Yellow Line also remain unmarked on the ground more than three months since the ceasefire began, leaving portions of Gaza without clear demarcation.
Local residents express fear and confusion as the atmosphere intensifies with military presence. Some have reported being trapped behind newly moved markers, exacerbating anxiety and uncertainty about their safety.
Repercussions of these territorial shifts have included deadly incidents, with the IDF being involved in several attacks that have led to civilian casualties.
Both international observers and local experts call these moves a tool for territorial engineering, allowing Israel to exercise control without formally announcing changes to borders.
