The Olympic torch relay has reached its most sensitive stage, the Tibetan capital of Lhasa.
Only carefully vetted volunteers were allowed onto the streets, which just months earlier were the scene of anti-Chinese riots and protests.
The two-hour relay began at the summer residence of the Dalai Lama - the Tibetan spiritual leader now in exile in India - and finished at the Potala Palace, the traditional seat of Tibetan rulers.
Journalists were subjected to tight security checks. A BBC correspondent says he passed through at least six checkpoints as he was driven in an official convoy to the start of the relay.
Our correspondent says that on the way he saw empty streets and shuttered-up shops - suggesting that anyone without an official pass had to stay at home.
Security was tight along the route, as China took pains to ensure the relay passed off without incident.