( CNN ) -- Russian police have identified two people they believe are the suicide bombers responsible for deadly bombings in Volgograd and detained two suspected accomplices , anti-terrorism officials said Thursday , according to Russian state news agency Ria Novosti . The National Anti-Terrorism Committee identified the suspected suicide bombers as Asker Samedov and Suleiman Magomedov . It said they belong to the Buinaksk militant group , based in the volatile southern Russian province of Dagestan , according to Ria Novosti . The two accomplices who are detained are brothers , both from Dagestan , and they are held on suspicion of assisting the suicide bombers in traveling to Volgograd , it said . The Volgograd twin bombings , which took place in December , killed 34 people and injured many others , heightening concerns about security in Russia before it hosts the Winter Olympics , which open in just over a week . Huge security operation . The Games are set to begin on February 7 in Sochi , and a huge security operation is under way around the Black Sea resort . Russia is pouring resources into ensuring that the Olympic Games , seen as a flagship project of President Vladimir Putin , go off without problems . A bitter battle for an independent Chechnya , lasting almost two decades , spawned an insurgency that has spilled into neighboring republics in the North Caucasus region , including Dagestan . Chechen warlord Doku Umarov , leader of the Islamist group Caucasus Emirate , last summer called on his followers to do what they could to disrupt the Games . He has said they will be held on the graves of Muslim occupants of Sochi , who he says were driven out by Russian imperial forces in the 19th century . Despite the shock waves from the Volgograd attack , International Olympic Committee President Thomas Bach said he was confident that Russia would keep the Winter Olympics safe .
Police says alleged suicide bombers from Volgograd militant group -- state news agency . two brothers , suspected accomplices , have been detained , report says . Dagestan has been trying to address security concerns before the Winter Olympics . Security fears have been heightened since Russia bombings the 19th century .