In this undated file photo, police officers patrol Red Square in Moscow, with St. Basil's Cathedral, left, and the Spasskaya Tower, right, in the background. (ALEXANDER ZEMLIANICHENKO / AP)

MOSCOW - Russia's Federal Security Service (FSB) announced on Wednesday it had prevented terror attacks planned by an Islamic State group in the Moscow region.

"Russia's FSB has thwarted activities of a cross-regional IS cell, participants of which intended to conduct subversive terror attacks in the Moscow region," the FSB said in a press release.

Security officers have detained one person, who is a citizen of a Central Asian country, in the Vladimir region, and seized a home-made bomb

The FSB said that an improvised explosive device filled with destructive agents and some other items and documents were retrieved.

An investigation is underway.

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