TEL AVIV, Israel (AP) — Israel stopped the entry of all goods and supplies into the Gaza Strip on Sunday and warned of “additional consequences” if Hamas doesn’t accept a new proposal to extend a fragile ceasefire.

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.