The British-based aid agency Save the Children UK said in a report released yesterday that it has uncovered evidence of widespread sexual abuse of children at the hands of peacekeepers and international aid workers in war zones and disaster areas.

UN Secretary General Ban Ki-moon, expressing "deep concern," said the United Nations will investigate the allegations that its peacekeepers are involved in the abuse.

The report, based on field research in southern Sudan, Ivory Coast, and Haiti, describes a litany of sexual crimes committed by peacekeepers and relief workers against children as young as 6.

It said some children were denied food aid unless they granted sexual favors; others were forced to have sex or to take part in child pornography; many more were subjected to improper touching or kissing.