Putin is spinning like crazy....if this story turns out to be true, the Russians are going to demand explanations from him. For all that we know, Putin may even blame this attack on capitalism!!
He will blame everything on the FSB and the police, and gain popularity by the populist approach announcing for improvements that won't be made. The Russians' have been brainwashed by this tactics by Putin for years. At last he will highlight his economic succeess to dim his security failures, and create an illusion of successes when there were many other failures. Poor Russians for being brainwashed by the state controlled media. The oligarchy wasn't good, and foreigners should have played a better role to educate the media before Putin gained control. It's all late.
Putin is continuing to support all our enemies with the hope that the alligator will eat him last. He is too much in love with himself and his hope for a legacy.