British undercover agents used innovation of British Intelligence Office for communication -masked for stone device was revealed in Moscow.

"The discovered device was prepared using space technologies. One can throw this "stone" from 9-th floor. It can stay under water for a long time. It has several levels of defence. By estimates of experts, the equipment costs several dozens millions of British pounds. Such miracle of technology could be created only in laboratory conditions", - said representative of Federal Security Service.

This is the second transmitting apparatus, which was discovered during the operation. First "stone" was taken by Brits. The second device stayed under observation for some time when the decision about its withdrawal was taken.

As it was known on Sunday evening Russian Federal Security Service exposed 4 British intelligence officers, who worked in Moscow under diplomatic cover.
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