China has refuted allegations made the by US that members of its military hacked into a Pentagon computer network.
In June, a hacker infiltrated one of the Pentagon's e-mail servers, which caused security staff to take up to 1,500 accounts offline to deal with the problem.
At the time, a spokesman for the Pentagon said the attack could have originated from a variety of sources including casual hackers, cyber vigilantes and ideological groups or possibly nation states.
But the Financial Times quoted US officials close to the matter as saying the Chinese army made the attack, which crashed part of a system for the defence secretary's office.
A member of China's foreign ministry, Jiang Yu, said Beijing "opposed and vigorously attacked" all attacks on the internet including hacking.
"Some people are making wild accusations against China ... These are totally groundless and also reflect a Cold War mentality," she said.
Earlier this year Gary McKinnon was found guilty of causing £475,000 worth of damage to computers by hacking into computer systems belonging to the Pentagon, Nasa and the US military from his home in North London.