According to Reuters, Google accused the Chinese government on Monday of hindering access to Gmail in the country.
The disruption of service, noted by many Chinese users in recent weeks, may be the result of a new blockade imposed by the government.
"There is no problem on our side, we checked this extensively," a Google spokeswoman said in a message. “This is a government block action carefully designed to make it look like Gmail's problem.”
This is not the first time Google has accused China of interfering with its services. In January 2010, the company said it had identified Chinese-originated attacks on human rights activists using Gmail.
China's Foreign Ministry declined to comment on the new wave of news.