Krokus-City Hall...

 ... they say more than 100 casualties have been confirmed so far. But get this: 

"На данный момент нет признаков того, что Украина или украинцы были вовлечены в вооруженное нападение", - сказал координатор стратегических коммуникаций в Совете национальной безопасности Джон Кирби на брифинге для СМИ. 

Translation: “At this time, there is no indication that Ukraine or Ukrainians were involved in an armed attack,” John Kirby, coordinator of strategic communications at the National Security Council, said at a media briefing.

Hm, why such a rush to the conclusions? The hallmarks of London and Washington activity are terrorist and false flag operations. This is the "surprise" GUR big honcho--a MI6 asset--Budanov was talking about.