China denies claims it stole US fighter plane plans

China dismissed accusations it stole F-35 stealth fighter plans as groundless, after documents leaked by former US intelligence contractor Edward Snowden on a cyber attack were published by a German magazine.

The Pentagon has previously acknowledged that hackers had targeted sensitive data for defence programmes such as the F-35 Joint Strike Fighter, but stopped short of publicly blaming China for the F-35 breach.

Defence experts say that China’s home-grown stealth jets had design elements resembling the F-35.

The Pentagon and the jet’s builder, Lockheed Martin Corp, had said no classified information was taken during the cyber intrusion.

German magazine Der Spiegel published a cache of Snowden documents, including a top secret US government presentation that said China stole “many terabytes” of data on the F-35 programme, including radar designs and engine schematics.

“The so-called evidence that has been used to launch groundless accusations against China is completely unjustified,” Foreign Ministry spokesman Hong Lei told reporters.

Hong said the “complex nature” of cyber attacks makes it difficult to pinpoint the relevant attacker, adding that China wanted to work with other countries to prevent hacking.