Chinese police have opened fire on Tibetan demonstrators in southwestern China, wounding 10 people, after the Tibetans protested against the detention of a respected village leader, a Tibetan rights group said.

The crackdown in the Ganzi prefecture of Sichuan province, a flash point for Tibetan protests against Chinese rule, underscores simmering tensions between Tibetans and the Chinese authorities.

The U.K.-based International Campaign for Tibet (ICT) group, citing several Tibetan sources in exile, said late on Wednesday the area "is now under tight control, with local Tibetans including the elderly and children subject to interrogation."