JERUSALEM — The United Nations agency responsible for the welfare of Palestinian refugees, already struggling with funding cuts, is bracing for fallout after a highly critical internal ethics report was leaked to international news outlets this week detailing claims of serious mismanagement and misconduct.

The confidential report by the agency’s ethics office, based in Amman, Jordan, alleged that members of an “inner circle” in the top management of the United Nations Relief and Works Agency engaged in “abuses of authority for personal gain, to suppress legitimate dissent and to otherwise achieve their personal objectives,” according to Al Jazeera, which first exposed the report on Monday.

Israel and Trump administration officials have previously accused the agency of wastefulness and of perpetuating the plight of Palestinian refugees, and have called for it to be shut down.

The ethics office report is also said to have raised accusations of nepotism and retaliation. And it claimed that there was an inappropriate relationship between the agency’s commissioner-general, Pierre Krähenbühl, a Swiss native who has held the position since 2014, and a senior staff member.