Remnants of the 1994 Rwandan genocide

UNITED NATIONS (CNN) -- CNN has learned a report submitted by a human rights team investigating massacres in the former Zaire uses the term "genocide" in concluding what happened to thousands of Rwandan refugees as they were forced back into Rwanda in 1994.

The report, still under review by senior U.N. officials, was seen by a source before it was turned over to U.N. Secretary-General Kofi Annan.

Following the Rwanda genocide of 1994, in which an estimated 500,000 minority Tutsi and Hutu moderates were killed, surviving refugees were forced into the former Zaire and neighboring countries. The human rights team has been investigating the massacres that resulted when the refugees were forced out of Zaire.

The report says forces loyal to Democratic Republic of the Congo President Laurent Kabila may have committed serious human rights violations and that there may have been serious "crimes against humanity".

Investigators also told the U.N. the real investigation has not begun yet.

Some 500,000 people were massacred

The human rights team had been recalled by Annan after months of being obstructed in their probe.

Annan told CNN Wednesday that the "report will not be watered down," but it appears the U.N. will be showing the document to President Kabila as a courtesy, following a separate agreement reached between Kabila and U.S. Ambassador to the U.N. Bill Richardson.

Richardson met with Kabila twice in a bid to keep investigators on the job.

A main conclusion of the report is to recommend a separate international tribunal to weigh justice for the massacres, but the Security Council may be leery of establishing another new tribunal for a complicated cross-border African issue.

The final report, which may not be released for a week to 10 days, goes first to the U.N. Security Council.

Meanwhile, The Organization of African Unity appointed a seven-member panel Wednesday to investigate the role of foreign powers and individuals in the 1994 Rwandan genocide.

OAU Secretary General Salim Salim of Tanzania said investigators also would examine ways to prevent a recurrence of such massacres.

Officials for the regional organization did not provide details about the scope of the investigation, which will be led by Botswana's former president, Ketumile Masire.

The current Kigali government has accused France, Belgium, Kenya, the former Zaire -- along with the United Nations -- of either aiding the extremist Hutu regime that perpetrated the genocide, acquiescing while it was carried out, or harboring war crimes suspects.

A U.N. tribunal has indicted 35 people on charges of genocide and crimes against humanity stemming from the genocide.

Rwanda, frustrated by the slow pace of the U.N. tribunal, is undertaking its own trials of 125,000 suspects. So far, 144 of 337 convicted have received death sentences.