Hamas accused Israel of trying to derail the existing ceasefire agreement and said its decision to cut off aid was “cheap extortion, a war crime and a blatant attack" on the truce, which took hold in January after more than a year of negotiations. Both sides stopped short of saying the ceasefire had ended.

Israel said Sunday it is stopping the entry of all goods and supplies into the Gaza Strip. The prime minister’s office did not elaborate on the decision but warned of “additional consequences” if Hamas does not accept what Israel says is a U.