MOSCOW - Russia's counter-terrorism agency says it's studying a video posted by an Islamic militant group that asserted responsibility for suicide bombings which killed 34 people last month and is threatening to strike the Winter Olympics in Sochi.
Security experts say the Russians are right in taking the threat seriously.
The video was posted online Sunday by a militant group in Dagestan, a predominantly Muslim republic in Russia's volatile North Caucasus. The Olympic host city of Sochi lies only 500 kilometers (300 miles) west of Dagestan.
Two Russian-speaking men featured in the video are identified as members of Ansar al-Sunna, the name of a Jihadist group operating in Iraq. It was unclear whether the men in the video had received funding or training from that group or only adopted its name.<