Spiegel reports that Chinese hackers have targeted computer networks operated by the German government. "German security officials managed to stop the theft of 160 gigabytes of data which were in the process of being siphoned off German government computers," the magazine reports. And Chancellor Merkel, who is currently in China, apparently raised the issue with Chinese prime minister Wen Jiabao.

German Chancellor Angela Merkel was all smiles after meeting Chinese Premier Wen Jiabao on Monday, praising relations between the two countries as open and constructive.

But her visit has been marred by a report in SPIEGEL that a large number of computers in the German chancellery as well as the foreign, economy and research ministries had been infected with Chinese spy software. Germany's domestic intelligence service, the Office for the Protection of the Constitution, discovered the hacking operation in May, the magazine reported in its new edition, published Monday.

The Chinese government has vehemently denied the report, with the Chinese Embassy in Berlin describing the accusation of state-controlled hacking as "irresponsible speculation without a shred of evidence."

But Prime Minister Wen Jiabao assured Merkel that measures would be taken to "rule out hacking attacks."

Earlier this year, military officials at the Naval Network Warfare Command told reporters that Chinese hackers "will exploit anything and everything" and that the nature of the attacks makes it "hard to believe it’s not government-driven.” It seems German officials have come to the same conclusion.