The United States should consider reparations to African-American descendants of slavery, establish a national human rights commission and publicly acknowledge that the trans-Atlantic slave trade was a crime against humanity, a United Nations working group said Friday.

The U.N. Working Group of Experts on People of African Descent released its preliminary recommendations after more than a week of meetings with black Americans and others from around the country, including Baltimore, Chicago, New York City, the District of Columbia and Jackson, Mississippi.

After finishing their fact-finding mission, the working group was “extremely concerned about the human rights situation of African-Americans,” chair Mireille Fanon Mendes-France of France said in the report. “The colonial history, the legacy of enslavement, racial subordination and segregation, racial terrorism and racial inequality in the U.S. remains a serious challenge as there has been no real commitment to reparations and to truth and reconciliation for people of African descent.”