Russia on Friday said for the first time that the Islamic State group coordinated the March concert hall assault in Moscow, the country’s deadliest terror attack in two decades. IS has claimed responsibility on multiple occasions for the 22 March attack, which killed over 140 people, but Moscow has repeatedly tried to link Ukraine and the West to the attack. FSB chief Alexander Bortnikov was quoted as saying by the RIA Novosti news agency that “preparations, the financing, the attack and the retreat of the terrorists were coordinated via the internet by members of Khorasan Province (IS-K),” an…