MOSCOW, September 10. /TASS/. Russia’s Federal Security Service (FSB) detained a former UK embassy security guard and Ukrainian Security Service (SBU) agent who was gathering information on British diplomats for Ukrainian blogger Dmitry Karpenko, also known as Apostol Dmitry, the press office reported.

A criminal case has been opened against the detainee on suspicion of state treason.

TASS has compiled the key information known at this time.

Detention

- During counterintelligence operations, the FSB exposed an agent of the Ukrainian Security Service, a Russian citizen born in 1981, who was an employee of a security firm providing protection for the UK embassy in Moscow, the FSB press office said.