A person familiar with the matter told Reuters that Butina worked as an assistant for Torshin. Butina's lawyers have identified Torshin as the person with whom she was accused of working.
Torshin has not replied to requests for comment on the U.S. investigation. The Russian central bank declined additional comments when contacted by Reuters on Friday.
The U.S. Treasury Department said the measures were a response to what is described as Russia's malign activity, including its actions in Ukraine, its support of President Bashar al-Assad in Syria's civil war and subverting Western democracies.
Butina is accused of working with a Russian official and two unidentified U.S. citizens to try to infiltrate a U.S. gun-rights organisation and influence American foreign policy toward Russia. Moscow has called the case against Butina fabricated and demanded her release. (Reporting by Elena Fabrichnaya Writing by Katya Golubkova and Tom Balmforth Editing by Christian Lowe)
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