Police in Nepal armed with batons dispersed a protest Tuesday by Tibetan refugees and monks in front of the Chinese Embassy.
About 100 protesters in Kathmandu were loaded into trucks and vans and sent to detention centers.
There have been almost daily demonstrations in Nepal against China since March 10, when protests began in Tibet's capital, Lhasa. At least 400 protesters were detained in Nepal Monday.
The U.N. human rights office in Nepal has said it is deeply concerned at the arbitrary arrests and detentions.
Nepal's border with China in the Himalayas is a key route for Tibetans fleeing Chinese rule in the region.
Some information for this report was provided by AP and Reuters.