Human Rights Watch is accusing China of putting strong pressure on Nepal to restrict the rights of Tibetans living in that country.
The group said in a new report
Tuesday that Tibetans face excessive use of force by Nepalese police, arbitrary arrests, spying, and threats.
Human Rights Watch said Nepal is under huge pressure from China to limit the number of Tibetans who can enter the country, in violation of international law.
Nepal has long been a refuge to Tibetans seeking to escape repression from China.
Nepal has also agreed to be a transit point for Tibetans looking to go to India.
Nepal has not responded to the new report, but has said it will not allow it to be used for anti-Chinese activities.
China has accused Tibetans of terrorism in fighting for an independence state.
Exiled Tibetan spiritual leader the Dalai Lama says Tibetans only want more autonomy inside China.