WASHINGTON (AP) — Human Rights Watch criticized the United Nations Thursday for raising the possibility of Myanmar contributing troops to the U.N.’s peacekeeping force, describing the nation’s military as among the most abusive in the world.

The New York-based group voiced its concerns in a letter to U.N. Secretary-General Ban Ki-moon. It said that despite the democratic opening in the country also known as Burma, its military remains unreformed and continues to use child soldiers.