JERUSALEM - The Israeli politician Benny Gantz, a key member of the country’s war cabinet, quit the government on Sunday over Prime Minister Benjamin Netanyahu’s handling of the war in Gaza.

A centrist figure, Mr. Gantz had threatened to resign by Saturday unless Netanyahu addressed his concerns about how the war would end and what would follow it.

Mr. Gantz had scheduled a news conference for Saturday evening but postponed it citing “recent events” after Israeli authorities announced the rescue of four hostages who had been held in Gaza.

But on Sunday night, he said in televised remarks that he could no longer remain part of Mr. Netanyahu’s government.