Israel on Monday boycotted a hearing at the United Nations’ top court on its decision to ban a UN aid agency that has served millions of Palestinians since it was established in 1949.

The U.N.'s top court is hearing arguments about whether Israel has violated international law by blocking starving Palestinians from receiving aid.

The United Nations criticized Israel for its ban on aid in hearings at the International Court of Justice. Israel did not send a legal delegation and rejected the proceedings as biased.