China today denied any state involvement in cyber attacks on Google and continued to defend their censorship of the internet, news agency AFP reported.

This comes as the row between China and Washington over the US firm's threat to leave the country rumbles on.

The statements from Beijing, carried in twin interviews on the state news agency Xinhua, came after the White House said US President Barack Obama was "troubled" by Google's claims that it had been attacked by China-based hackers.

The US internet giant has threatened to abandon its Chinese search engine, and perhaps end all operations in the country over the cyber attacks. It has also said it is no longer willing to bow to Chinese government censors, AFP said.