The United States has put forward a new proposal that would secure the release of a handful of living hostages held by Hamas in exchange for a month-long extension of the Israel-Hamas ceasefire, a source familiar with the negotiations said.

Hundreds of aid trucks have entered Gaza daily since the ceasefire began on Jan. 19​, and it was unclear what the immediate impact of the aid cutoff would be.

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.