Satellite images provide one way to get a sense of the devastating impact of the war on the Gaza Strip. Research released in the U.S. on Thursday estimates 59.8% of all buildings in the territory Gaza likely have been damaged in the war.

The dispute underscores the fragility of the deal as mediators worked to ensure that it would go into effect on schedule.

The deal is set to pause fighting in Gaza for six weeks as well as lead to the release of 33 hostages and hundreds of Palestinian prisoners.