Witnesses say Nepalese police have kicked and beaten Tibetans trying to protest outside the Chinese Embassy in Kathmandu.
Witnesses say some of the protesters were hurt in the scuffle Sunday.
Police say they rounded up at least 230 Tibetans, including nuns and monks, who were shouting slogans critical of Chinese rule in Tibet.
Nepal is home to about 20-thousand Tibetans who fled their homeland after a failed uprising against Chinese rule in 1959.
Many of them have been protesting almost every day for the past five months, since Chinese forces brutally suppressed demonstrations in the Tibetan capital, Lhasa.
On Friday, Nepalese authorities detained about 13-hundred Tibetans who were protesting in Kathmandu as China opened the Olympic Games in Beijing.
Nepal officially supports Beijing's "One China" policy, calling Tibet a part of China. Nepal's Home Ministry has said it will not tolerate protests against what it describes as "friendly countries."