"U.S. intelligence agencies believe that certain elements of the Ukrainian government authorized the car bombing ... which killed Daria Dugina," the report said.
The material claims that Washington did not take part in the attack, and the American representatives did not know about the preparation of this attack.
The car driven by Dugina was blown up on the evening of August 20 in the Moscow region.
According to the FSB, Ukrainian special services are behind the murder of the journalist, the performer is a citizen of Ukraine Natalia Vovk.
Together with her, the murder was prepared by a citizen of Ukraine Bogdan Tsyganenko.