The Federal Security Service (FSB), Russia's domestic security service, said on Monday, 31 December, that a US citizen had been detained in Moscow in a suspected case of espionage.
- According to local news agencies quoted by a report in Independent, the American was detained on 28 December and a criminal case had been opened against him.
- If found guilty, he faces up to 20 years in prison.
- The US embassy in Russia was unavailable for comment.
(This is a developing story and will be updated with more details.)