China's authorities have released pictures of Friday's violence in Tibet, some of the worst anti-Chinese protests there in 19 years.
This picture from the official Xinhua news agency shows shops that were attacked by protesters. The authorities say 10 people - mostly business people - were killed.
This picture - sent to the BBC by a reader - shows troops patrolling Lhasa's streets on Saturday - when some small-scale clashes were reported.
The head of Tibet's government, Champa Phuntsok, urged those involved to give themselves in. He promised leniency if they do, but a harsh response if they do not.
Exiled Tibetans in several countries - including neighbouring Nepal - demonstrated their support for the protesters.
In the Indian capital, Delhi, police had to restrain Tibetan activists who marched on the Chinese embassy.
Meanwhile far from the unrest in Lhasa, the National People's Congress - Beijing's rubber-stamp legislature - was a picture of order and discipline.