Israeli Prime Minister Benjamin Netanyahu’s office said Thursday his Cabinet won’t meet to approve the agreement for a ceasefire in the Gaza Strip and the release of dozens of hostages until Hamas backs down, accusing the group of reneging on parts of the agreement in an attempt to gain further concessions.

Israel’s security cabinet is convening Friday to decide whether to approve a deal that would release dozens of hostages held by militants in Gaza and pause the 15-month-war. If the cabinet approves, the deal will then go to the government for the final sign-off.