The United Nations fired several staffers at its Palestinian refugee agency over Israeli allegations that they took part in the Oct. 7 attack by Hamas, news that prompted the U.S., Italy, Australia and Canada to suspend funding.

U.N. Secretary-General Antonio Guterres "is horrified by the news” that workers with the U.N. Relief and Works Agency, or UNRWA, may have been involved in the attack by Hamas militants on southern Israel, and urged the agency’s chief to refer the accused for potential prosecution, his office said in a statement Friday. According to the statement, there will be an "urgent and comprehensive independent review” of the agency.

The claims come as a black eye for UNRWA, which provides humanitarian assistance and protection to Palestinian refugees in the Gaza Strip, Jordan, Lebanon, Syria and the West Bank. It has long been regarded with suspicion by Israel and Republicans in the U.S., who argue that it only fuels the Israeli-Palestinian conflict and money going to food, education and health care frees up Hamas to fund hostilities against Israel.