(DAILYMAIL) — Top military officials have been warned not to have sex with attractive women in Russia or China in case they are spies, it has been reported.

A leaked document says agents of the FSB, Russia’s intelligence service and successor to the Soviet-era KGB, could attempt to lure British officials into bed and then blackmail them.

The document, the Ministry of Defence Manual of Security, warns senior officers that the FSB, could gain valuable intelligence by exploiting ‘knowledge of marital infidelity or sexual activity the target may wish to hide’.

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