A suspected organizer of a recent St. Petersburg metro blast was detained on Monday in the Moscow Region, Russia's Federal Security Service said in a statement.
Azimov, 27 years old, who was interrogated by the Russian Investigations Committee, is a member of the group of people involved in an attack with dynamite that was carried out on April 3.
The FSB said the man arrested Monday was believed to have helped prepare the suicide bomber.
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Dzhalilov, 22, was killed in the explosion.
Russia's Federal Security Service (FSB) said the suspect was arrested in Odintsovo, a city just outside Moscow.
On April 3, an explosive device went off in a subway train auto when the train was moving from Tekhnologichesky Institut station to Sennaya Ploshchad station.
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Russian news agency RIA cites FSB security officials as saying, Jalilov is believed to have been trained by Azimov.
It is noted that Azimov was born in 1990 and is a native of the Central Asian Region.
However, there was no evidence that they were in any way linked to the suicide attack in St Petersburg. The six others were intercepted in St Petersburg. Kyrgyz authorities said he is a Russian national born in the nation of Kyrygrzstan, the former Soviet Republic in central Asia.
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