MOSCOW, March 11. /TASS/. The first-ever South Korean citizen detained in Russia over charges of espionage, was transferred from Vladivostok to Moscow, a law enforcement source told TASS.

"During the investigation of an espionage case, a South Korean citizen Baek Won-soon was identified and detained in Vladivostok, and put into custody under a court order. He was transferred from Vladivostok to Moscow for further investigation," the source said.

The South Korean citizen was detained in Vladivostok earlier this year and transferred to Moscow in late February; he is currently being held in custody in the Lefortovo detention facility. On Monday, the Lefortovsky Court prolonged his arrest for 3 months, until June 15.

According to the law enforcement source, Baek Won-soon was handing over classified information to foreign intelligence agencies. The foreigner’s criminal case materials have been marked ‘top secret.’.