From Voice of America:

China has admitted for the first time that a massive hacking attack on U.S. government databases was carried out by Chinese hackers, but denies it was a state-backed operation. Chinese state media say the incident was among several others discussed during high-level cyber security talks in Washington this week. The revelation was mentioned almost in passing in a Xinhua state media report this week on the talks. The report did not provide any other details about the hackers or if they have been arrested.