Russia begins criminal case against US citizen for suspected espionage

Announcement by Moscow agency comes at a time of fraught ties between countries since start of Ukraine war

Russia's FSB security service said on Thursday it has opened a criminal case against a US citizen suspected of espionage, as ties between Moscow and Washington disintegrate further over the Kremlin's nearly year-long Ukraine offensive.

The FSB did not name the person or provide any other details, nor did it say whether the suspect had been arrested.