Russia remanded in custody on Tuesday a Kyrgyzstan-born man suspected of involvement in Friday’s mass shooting at a Moscow concert hall, and sent investigators to Tajikistan to question the families of four men charged with carrying out the attack.
Eight suspects have now been remanded in pretrial detention since gunmen sprayed concertgoers with bullets in the deadliest attack in Russia in two decades, days after president Vladimir Putin celebrated an election that handed him a fifth term.
Islamic State has claimed responsibility and released footage from the attack. The United States and France say intelligence suggests the group was indeed behind the attack, in which 139 people were killed and 182 injured.
Mr Putin said on Monday the attack had been carried out by Islamic militants but also suggested that Ukraine, which is at war with Russia, may have played a role. Ukraine has denied any role. Islamic State, also known as Isis, have not identified any of the attackers.
[ Display of tortured men is Russia’s warning to the public, say analystsOpens in new window ]
Russia has said the four suspected gunmen have confessed, but some showed signs of injuries when they appeared in court, raising concern they had been tortured.
Russia's commissioner for human rights said detention of suspects should be carried out in accordance with the law, TASS news agency reported, after videos were published showing the interrogation of the suspects. One had part of his ear cut off during questioning.
“It is absolutely unacceptable to use torture on detainees and defendants,” the commissioner, Tatyana Moskalkova, was quoted as saying by TASS.
Russian authorities have said they are investigating.
The arrests have cast a spotlight on two mainly Muslim former Soviet republics in central Asia that have close ties with Moscow and depend on remittances from migrant labourers working in Russia.
Three Tajik sources told Reuters on Tuesday that Russian investigators were in Tajikistan questioning the families of the four suspected gunmen, saying their relatives had been brought to the capital Dushanbe from their hometowns.
On Tuesday, Mr Putin said he hoped prosecutors would do everything to ensure the attackers would be justly punished.
[ Display of tortured men is Russia’s warning to the public, say analystsOpens in new window ]
Kyrgyzstan-born Alisher Kasimov, remanded in custody on Tuesday, was led into the courtroom bent double – like the other suspects – before his handcuffs were removed. He showed no visible signs of injury.
He is accused of providing accommodation to the four Tajik men accused of carrying out the attack.
The Tajik sources said Tajik President Emomali Rakhmon was personally overseeing the Tajik part of the investigation into the Moscow attack, which he said was a “terrible and shameful event”.
Russian investigators say that after firing from Kalashnikov AK-47 weapons, the attackers set fire to the building with gasoline before leaving, hitting a family with two young children as they sped out of the car park.
Earlier this month, Rakhmon said his government was alarmed by the activity of radical Islamist preachers who were “brainwashing” Tajik youths, making them susceptible to manipulation by foreign groups and intelligence agencies.
The motive for the attack is not clear. Russia, along with the United States and Syrian forces, played a major role in defeating Islamic State in Syria.
Driven out of Syria, its fighters scattered and different branches emerged, including an Afghan branch, ISIS-Khorasan, which seeks a caliphate across Afghanistan, Pakistan, Turkmenistan, Tajikistan, Uzbekistan and Iran.
Sanaullah Ghafari, the 29-year-old leader of the Afghan branch of Islamic State, has overseen its transformation into one of the most fearsome branches of the global Islamist network, capable of operations far from its bases in the borderlands of Afghanistan.
Alexander Bortnikov, the director of Russia's FSB security service, said the number of accomplices in the attack would be larger than the 11 reported to have already been detained, and that western intelligence services and Ukraine needed the attack to “sow panic” in Russia.
RIA news agency quoted Bortnikov as saying Ukrainian intelligence services had contributed to the attack, and that it was “known” that Ukraine had trained militants in the Middle East.
Bortnikov was also quoted as saying Russian intelligence services had reacted to the U.S. warning, but that it had been of a general nature. He suggested western intelligence services and Ukraine had “needed” the attack, hoping it would create panic in Russian society.
Russia's prosecutor general called it a new challenge to the entire law enforcement system.
Close Putin ally Nikolai Patrushev, the secretary of Russia's Security Council, said Ukraine was “of course” behind the attack, after days of indirect suggestions from Moscow that Kyiv was to blame.
The Kremlin refused to be drawn on whether it believed there was a link between the Ukrainian leadership and Friday’s attack, saying only that its investigation was ongoing. – Reuters
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