Security forces are deployed at the work site and in neighboring counties to suppress potential protests.
Chinese authorities ordered her not to discuss the death or send information to contacts outside the area.
He had spoken out while under supervision after completing a lengthy term in prison.
Nyima Lhamo had knowledge of the circumstances surrounding Tenzin Delek Rinpoche's July 2015 death in prison.
He and others had celebrated the exiled spiritual leader's birthday in online conversations.
He had been jailed for two and a half years for supporting a self-immolation protest against Chinese rule.
Detained by police last November, he is found 'languishing' in a prison in Sichuan, a local source says.
She was taken into custody after holding up a photo of the Dalai Lama while walking down a road in the county seat.
Villagers risk punishment for show of loyalty to the exiled spiritual leader reviled by communist authorities.
Resident monks and nuns make no move to resist as work crews move in to tear down dwellings.
In a solitary public protest, he had called out for Tibetan freedom and the long life of exiled spiritual leader the Dalai Lama.
He is forbidden for now from returning to his monastery, and must live with a relative under close supervision.
She is taken into custody after holding up a photo of the Dalai Lama while walking down a road in the county seat.
Tibetans in one county can't find fresh water, while residents in another county confront their governor after a flood.
Senior teachers at the Tibetan Buddhist study center ask followers not to protest for fear of 'repercussions' from Chinese authorities.
They warn local Tibetans they will be jailed if they refuse to sell at the low rate of compensation being offered.
The move is seen as appeasing the Himalayan country's powerful northern neighbor China.
One dies after a beating by police, while the other hasn't been heard from for years.