NEW YORK - The U.S. military is holding about 500 juveniles suspected of being "unlawful enemy combatants" in detention centers in Iraq and has about 10 detained in Afghanistan, the United States has told the United Nations.

A total of 2,500 youths under the age of 18 have been detained, almost all in Iraq, for periods up to a year or more in President Bush's anti-terrorism campaign since 2002, the United States reported last week to the U.N.'s Committee on the Rights of the Child.

Civil liberties groups such as the International Justice Network and the American Civil Liberties Union (ACLU) denounced the detentions as abhorrent, and a violation of U.S. treaty obligations.