The Office of the U.N. High Commissioner for Human Rights released a 233-page report Monday on the 10-year conflict in Nepal.
The conflict ended in 2006 with a comprehensive peace agreement. The Nepalese government committed itself to "establishing the truth" about what happened during the crisis to ensure victims of atrocities "receive both justice and reparations," the report stated.
The report said at least 13,000 people were killed and another 1,300 are missing. It states that unlawful killings against enemy combatants and civilians were widespread.
U.N. High Commissioner for Human Rights Navi Pillay said as many as 9,000 accounts of violations of international human rights law were documented during the conflict. Civilian courts in Nepal haven't tried anyone for their role in the violence, however.
"Six years later, the transitional justice mechanisms promised in the peace accords have still not been established, and successive governments have withdrawn cases that were before the courts," Pillay said in a statement.
"Perpetrators of serious violations on both sides have not been held accountable, in some cases have been promoted, and may now even be offered an amnesty."