Hundreds of Tibetans were beaten and detained in February during rare protests against China’s planned Gangtuo dam on the Jinsha River, according to sources and footage verified by the BBC. The protests underscore growing tensions over Beijing’s controversial hydropower projects in Tibetan territories. “Our ancestors were here, our temples are here,” said one Tibetan protester. “It is very painful to move. What kind of life would we have if we leave?”