Kirti monk Lobsang Tsultrim called out for Tibetan freedom before being taken away by police.
Vientiane wants to begin construction on the controversial project this year.
Protestors want the government to take back the identification cards.
The move comes as momentum builds for a truth-and-reconciliation style reckoning with the island's dark political past.
Tsawa Danyuk had offended both Chinese authorities and Tibet's Buddhist clergy with his critical writings, sources say.
Instead, they want to hold discussions with government representatives about a ‘new path to peace.’
The arrests may be part of a campaign to pressure Uyghur officials into greater loyalty to Beijing, one observer says.
Conviction adds to controversy over use of the social media platform that has become a force in the country,
The opposition Cambodia National Rescue Party prepares to restructure its leadership.