The investigators also found out that Akram traveled to Turkey twice over the past year. The suspect himself denies any involvement in the attack.
Earlier, the head of the Federal Security Service (FSB), Aleksandr Bortnikov, confirmed that Russian investigators had managed to identify the mastermind behind the St. Petersburg Metro attack.
However, he did not offer any additional details about the organizer or their links to individuals currently under investigation.
Russian law enforcement has so far taken into custody 10 people suspected of involvement in the terrorist attack, including Akram Azimov.
Akram’s younger brother, Abror, was identified as the alleged organizer of the suicide bombing after his arrest on Monday.
Akram Azimov was arrested on Wednesday. Following his detention, the FSB said that he “abetted the transfer of funds” used to prepare the attack and helped to establish communication with international terrorist networks.
Abror was detained on Monday and eight other suspects were arrested earlier in April on suspicion of being involved in the St. Petersburg attack.
The bombing took place in the St. Petersburg Metro on April 3 and was carried out by Akbarzhon Dzhalilov, a Russian citizen of Kyrgyz origin. It claimed the lives of 14 people and left dozens injured.
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