MOSCOW -- Russian investigators on Tuesday announced the identity of the last suspect involved in deadly twin blasts in Moscow metro stations a year ago.

Spokesman of the Russian Federation Investigative Committee, Vladimir Markin, said the last suspect was identified as a 22-year-old native of Russian republic of Dagestan in North Caucasus region.

"The perpetrator of the terrorist acts is Gusen Magomedov, 22, a native of Dagestan. According to investigators, it was he who accompanied the female suicide bombers Mariam Sharipova and Janet Abdullayeva from Kizlyar to Moscow, and also managed their actions on the day of the attacks," Markin said.

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Markin noted so far the Investigative Committee has identified all three suspects of the attacks, but he did not reveal when the last suspect was identified by investigators.

Meanwhile, Markin reconfirmed that the mastermind of the attacks was notorious militant leader Magomedali Vagabov.

"The explosions at the Moscow metro stations were organized by Magomedali Vagabov, a leading figure in the terrorist underground that operated in the territory of Dagestan," Markin said.

The warlord was killed in a special operation conducted by the Russian Federal Security Service (FSB) last year, he said.

Earlier on Tuesday, dozens of Muscovites have brought flowers to the two metro stations to commemorate victims of the terrorist attacks a year ago.

On March 29, 2010, twin blasts with an interval of about 45 minutes rocked Lubyanka and Cultural Park metro stations in downtown Moscow during rush hours, killing at least 40 people and injuring dozens of others.

Russia has been plagued by terror attacks for years, many of which originate from the Caucasus region. Violence is common in the North Caucasus republics of Chechnya, Dagestan and Ingushetia with militants frequently mounting attacks against police officers and authorities.

Moscow has vowed to bring stability to the region via improving social services and raising pensions and salaries as measures to tackle corruption and terror infiltration.