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It is home to almost all of the country’s 7,000 ethnic Dulong, or Drung, one of the smallest of the 56 official national ethnic groups.

Drung Gertso set herself alight at the Tso Monastery in the Gannan Tibetan autonomous prefecture, Xinhua reported, citing a statement from the Communist Party in Gannan.

"Drung Gertso had intermittent mental disease, and she used to tell some of her relatives that she would commit suicide owing to frustration over family conflicts," Xinhua said.

The report said Drung Gertso, 26, had "intermittent mental disease" and was suicidal "over family conflicts".

There is a chain of three hills, Stookaniller, Knockatinna, and Knockboy, lying between Behy bridge on the east and Drung mountain on the west, and isolated from the hills to the south-east by the valley of Glanbehy.