Chinese Foreign Ministry spokesman Qin Gang accused Google of spreading pornography and breaking Chinese law.
Separately, google.com and some of its products, such as its mail service, were not available in China from Wednesday night to Thursday morning Beijing time, according to Chinese portal Sohu.com
The disruption to Google's services reported by users in Beijing and Shanghai comes a week after China accused Google of deliberately linking to "pornographic and vulgar" websites and ordered it to stop.
"We have found that Google has spread a lot of pornographic content, which is a serious violation of Chinese laws and regulations," Mr Qin told reporters on Thursday.
The latest comment raises the concern about a broader trade war between the US and China over everything from computer security to chicken poultry imports.
It came a day after it filed an unfair trade complaint to the World Trade Organization (WTO) over raw material exports.
BBC News : http://news.bbc.co.uk/2/hi/business/8118055.stm