Rioting spread to several other provinces in Tibet after demonstrations in Lhasa become violent:

Protests against Chinese rule of Tibet were reported in neighboring Sichuan and Qinghai provinces and also in western Gansu province. All are home to sizable Tibetan populations.

The demonstrations come after protests in the Tibetan capital Lhasa escalated into violence Friday, with Buddhist monks and others torching police cars and shops in the fiercest challenge to Beijing's rule over the region in nearly two decades.

"Whether intentionally or unintentionally, some kind of cultural genocide is taking place," said the Dalai Lama, the exiled Tibetan spiritual leader. He was referring to China's policy of encouraging the ethnic Han majority to migrate to Tibet, restrictions on Buddhist temples and re-education programs for monks.