The Chinese Defense Ministry said on Thursday that the military should enhance its information security following the allegations of U.S. eavesdropping on close European allies.

The alleged surveillance by the United States has rung alarm bells and reminded the Chinese military to step up its information security, said Defense Ministry spokesman Yang Yujun at a monthly press briefing.

When asked whether the Chinese military has been monitored, Yang said, "As the United States can monitor its allies, what they will do to a non-ally country such as China can be easily imagined."

The Chinese military has a set of strict regulations on information security, said Yang, but he added that this work should be honed.

The United States is under fire after revelations that the National Security Agency (NSA) and other U.S. intelligence agencies have monitored emails and phone calls of European leaders including German Chancellor Angela Merkel.