RIA Novosti reports about this.

“ISIS bears full responsibility for this attack. There was no Ukrainian involvement,” Watson said.

Earlier, White House press secretary Karine Jean-Pierre said that the United States condemns the terrorist attack at Crocus City Hall and expresses its condolences to the loved ones of the victims. Moreover, in the context of the terrorist attack, she noted that ISIS* is a common enemy that must be defeated everywhere.

Also, the official representative of the Russian Foreign Ministry Maria Zakharova said that the United States and Ukraine lied - they could not agree on a single version of the terrorist attack in the Crocus near Moscow.

* “Islamic State” (IS, ISIS) is an organization recognized as terrorist by the decision of the Supreme Court of the Russian Federation dated December 29, 2014.