Israeli Prime Minister Benjamin Netanyahu’s office alleged that Hamas had backed out on parts of a Gaza ceasefire and hostage deal agreed Wednesday, potentially delaying a truce between the two sides that was set to go into effect on Sunday—a day before President-elect Donald Trump takes office.

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 from what it called a “last minute crisis.