MOSCOW, May 20. /TASS/. A Moscow court on Wednesday sanctioned the arrest for two months of the Lithuanian secret service agent detained in Moscow on suspicion of spying.

Arstidas Tamosaitis will remain in custody at least until July 20, spokesperson for the Lefortovo court Yulia Skotnikova told TASS, noting that the session had been held behind closed doors.

A Lithuanian secret service agent was detained in Moscow on May 19 on suspicion of spying, the public relations centre of the federal security service FSB told TASS earlier on Wednesday.

"On May 19 a Lithuanian citizen identified as a foreign intelligence agent was detained in Moscow. He was seized the moment he was receiving secret documents from a Russian citizen," the FSB said.

The detained Lithuanian was taken to the FSB office.

"When confronted with evidence, he testified that he was an officer of the 2nd department of operative services (military intelligence) of the Lithuanian Defence Ministry," the FSB said.

The Lithuanian agent was placed in the Lefortovo detention centre.