A thing that’s really annoying to me about this is they don’t specify what the gunmen looked like and specifically what rifles they were carrying. IS has claimed responsibility, but if it was a bunch of Russian dudes with brand new AKs, it’s far less likely it was actually the IS, and was just an FSB op. Granted the FSB could have supplied brand new AKs, but far less likely to be IS if it was just some Russian commandos