China has said it has suffered its "biggest ever" cyber-attack, causing many websites based in the country to go temporarily offline.
The distributed denial of service (DDoS) attack was said to have targeted servers responsible for sites with a ".cn" domain name.
The country has not speculated on who may be responsible.
DDoS attacks, in which a target is flooded with traffic in an attempt to render it unreachable, are common.
The technique is typically employed by hacktivists looking to disrupt websites from operating correctly.
The China Internet Network Information Center confirmed the attack with anofficial statement informing internet users that it is gradually restoring web services and that will operate to improve the security level of the Internet infrastructure of the country to prevent and mitigate further attacks. Following the translated announcement: