ISIS has released a new statement this morning showing what they deem as proof that these Crocus City Hall attackers were part of ISIS.

They show a photo of these attackers in front of an ISIS flag before the attack and show the photos after they had been arrested by Russian police.

Via OSINTdefender:

ISIS has now released an additional Statement in which they claim Responsibility for the Terrorist Attack last night against the Crocus Concert Hall in the Russian Capital of Moscow; while also Posting a Picture of the Attackers only minutes before the Shooting began, in which you can clearly see the same Outfits on several of the Terrorists that were Arrested by Russian Security Forces in the Bryansk Region earlier today.

 
Visegrad24 posts their full statement in English:

The official ISIS outlet “Al-Amaq” releases a longer statement on the attack in Moscow and includes a photo of the attackers.

Here is the statement translated into English

“The attack is part of the war between the Islamic State and the countries waging war on Islam”