ABC NEWS REPORTS ON U.N. SEX CRIMES IN THE CONGO:

Widespread allegations of sexual exploitation and abuse of Congolese women, boys and girls have been made against U.N. personnel who were sent to help and protect them — despite a so-called zero tolerance policy touted by the United Nations toward such behavior.

The range of sexual abuse includes reported rapes of young Congolese girls by U.N. troops; an Internet pedophile ring run from Congo by Didier Bourguet, a senior U.N. official from France; a colonel from South Africa accused of molesting his teenage male translators; and estimates of hundreds of underage girls having babies fathered by U.N. soldiers who have been able to simply leave their children and their crimes behind.

Ravaged by decades of civil war, and one of the poorest countries in the world, Congo has relied on the United Nations for both military protection and humanitarian aid.

There will be a story on 20/20 tonight.