MOSCOW — Five terror suspects were detained Saturday in one of Russia’s North Caucasus provinces as the country’s security agencies were scrambling to uproot any potential threat to the Sochi Games.

The bust in the city of Nalchik, about 185 miles east of Sochi, comes less than a month before the start of the 2014 Winter Olympics.

The National Anti-Terrorism Committee said the suspects belonged to an international terror group and were in possession of grenades, ammunition and a self-made explosive device. The agency didn’t give further details.

The arrests follow back-to-back suicide bombings in the city of Volgograd in southern Russia, which killed 34 and wounded 100 others, on Dec. 29-30.

No one has claimed responsibility for the Volgograd attacks, but Chechen rebel leader Doku Umarov, who leads Islamic insurgents in the North Caucasus, urged his men to attack civilian targets in Russia and specifically target the Sochi Olympics.

Security fears were further heightened Thursday when police found four cars with the bullet-riddled bodies of six men near the city of Pyatigorsk, about 170 miles northeast of Sochi across the North Caucasus Mountains.

Explosive devices had been placed near three of the cars, although only one of the bombs went off.

Security forces in the region were scrambling to track down those responsible for those killings.

Russia has deployed tens of thousands of police, troops, security agents and rescue workers to protect the games, which run Feb. 7-23.