MOSCOW, Jan 26 (Reuters) - U.S. ambassador to Moscow John Sullivan has arrived at Russia's Foreign Ministry to deliver Washington's response to Russia's security demands, the Kommersant newspaper reported on Wednesday without specifying the source of information.
The U.S. Embassy did not immediately reply to a Reuters' request for comment. (Reporting by Anton Kolodyazhnyy and Tom Balmforth; Writing by Polina Devitt; Editing by Alison Williams)
