Chinese Prime Minister Wen Jiabao has accused the Dalai Lama of inciting days of violent protests in Tibet.
The Dalai Lama has said he would resign as Tibetan leader if violence went out of control.
Speaking at the close of parliament, Wen Jiabao accused the exiled Tibetan leader of organising the rioting and said the protestors wanted to 'sabotage' this year's Olympics.
He said people should respect the principles of the Olympics and the Olympic Charter and not politicise the Games.
He also said China's response to the violence was restrained.
Tibet's main city, Lhasa, is under tight police control after China's deadline for demonstrators to surrender expired last night.
It is not known what happened after an overnight deadline for protestors in Tibet to turn themselves in to authorities or face serious consequences.
China blamed Tibetan 'mobs' for the deaths of 13 people in violent anti-Chinese rioting on Friday, while Tibetan exile groups have said around 100 people or more were killed as China quashed the protests.
No access
Foreign tourists and journalists have been blocked from entering the region.
Activist groups with long-standing connections in Tibet have also indicated that they are having difficulty finding out what is happening.
Premier Wen Jiabao said China would 'consider the possibility' of organising access to Tibet for foreign journalists but did not say when that might happen.
He added that the situation in Lhasa was returning to normal.
The unrest, and the virtual sealing off of the region, has renewed international attention on China's human rights record amid scattered calls from Tibetan activists and campaigners to boycott the Games.
But while many nations have called on China to use restraint in dealing with the protestors, none have said they would boycott the Olympics.
UN Secretary General Ban Ki-moon yesterday called on the Chinese authorities to 'avoid further confrontation and violence' in his first public comments since the crackdown.
While US Secretary of State Condoleezza Rice called on Beijing to open talks with the Dalai Lama, who has lashed out at Chinese 'cultural genocide' in Tibet but has also stopped short of calling for an Olympics boycott.
China's Prime Minister said Beijing would only hold talks with the Dalai Lama if he gives up independence ambitions for his Himalayan homeland - a vast region more than twice the size of France that makes up about one-eighth of China.
Tibet has been a flashpoint issue for China's Communist leadership ever since it came to power in 1949.
Communist forces were sent into Tibet in 1950 to 'liberate' the region, with its official rule beginning a year later.
The Dalai Lama fled to exile in 1959 after a failed uprising against Chinese rule.
Last week's riots targeted Chinese-owned banks and shops, hundreds of which were reportedly set ablaze.
