Russian security forces have arrested 15 heavily armed suspected Islamist radicals who allegedly belong to a banned extremist group.
Russian officials say members of Takfir wal-Hijra were detained Wednesday as police found explosives, guns and other weapons in a raid on an apartment in Moscow.
Television footage shows police confiscating weapons and handcuffing suspects while they were lying on the floor. Extremist literature was also found.
Russian authorities have tightened security leading up to the Olympics in February in the southern resort city of Sochi, which is near the volatile North Caucasus.
Takfir wal-Hijra began in Egypt in the 1970s and has since been banned there. It was labeled an extremist organization in Russia in 2010.