New Delhi, March 13 -- The United States will intervene in the genocide case against Israel brought at the United Nations' highest court by South Africa, arguing that the accusations are false and warning that a ruling against Israel could undermine international law.

The International Court of Justice is considering whether Israel's military operation in Gaza to crush Hamas amounts to genocide under a treaty drawn up after World War II. Israel, which was founded in the aftermath of the Holocaust, has vehemently denied the allegations.

In a filing obtained on Thursday by The Associated Press, the U.S. says that the accusations are part of a "broader campaign" against Israel and the Jewish people "to justify or encourage terrorism agains...