Video of the detention in the industrial Ural Mountains city of Nizhny Tagil posted by the TASS news agency showed agents in military uniforms forcing a man to the ground and then handcuffing him outside an apartment building.
The man is then taken into an apartment, where the video cuts to an interrogation of a couple.
The FSB claimed that the unnamed woman had admitted to selling blueprints of an unidentified Nizhny Tagil defense enterprise to Ukraine’s intelligence agencies for 100,000 rubles ($1,200).
The blueprints could be “used against the Russian Armed Forces during the special military operation,” the press office of the FSB’s Sverdlovsk region department said in a video shared by TASS, according to Moscow Times.
The FSB said that “items used in espionage activity” had been discovered during a search of the unnamed couple’s apartment.
A court placed the couple in pre-trial detention on charges of treason.
Treason carries a maximum penalty of 20 years in prison under Russian law.
The Nizhny Tagil couple’s detention follows a slew of treason cases amid a sweeping crackdown on Russians accused of publicly opposing their country’s invasion of Ukraine.
MNA/PR