Links to the WikiLeaks website have been blocked within China amid potentially embarrassing claims made in leaked US diplomatic cables posted to it.
Attempts to access the wikileaks.org and cablegate.wikileaks.org sites were met with a notice saying the connection had been reset.
The message is the standard response prompted when a website is being blocked by Chinese authorities, who exert rigid controls over internet content.
While government content blocks are not at all unusual, WikiLeaks may have been singled out because of some of the assertions made in the leaked cables.
Such accusations include claims that Chinese leaders are prepared to accept South Korea's eventual rule over the entire Korean peninsula and China's Politburo directed a cyber intrusion into Google.