Revealed: second Kremlin spy ring targeting Russian dissidents discovered in UK

Russian investigative journalist Roman Dobrokhotov was the target of a spy ring involving six Bulgarian nationals. Photograph: Andy Hall/The Observer

A second Kremlin spy operation has been discovered targeting Russian dissidents in Britain, it can be revealed.

Roman Dobrokhotov, a journalist in the sights of the six Bulgarians convicted of spying for Russia, said he had been informed of fresh attempts to surveil his family.