Moscow attack: suspect had pro-Ukrainian content on his phone, investigators say. At least 144 people died and 360 were injured in this attack claimed by IS.
More than a dozen suspects were arrested, including the four alleged attackers. If President Vladimir Putin admitted that the Moscow attack was committed by "radical Islamists", the Russian authorities persist in seeing a Ukrainian lead, or even Western complicity. Ukraine, which firmly denies this, accuses Russia of wanting to "shift the blame" onto it.