China denied allegations of backing hackers to launch cyber attacks against other countries, stressing that it is in the common interests of the world to responsibly safeguard international cyber security.

It's unprofessional and irresponsible to accuse China before verifying the anonymous hackers' identification, Defense Ministry spokesman Yang Yujun told a news conference on Thursday.

Yang's remarks were made in response to a number of recent reports playing up "China's cyber warfare".