MOSCOW, Jan 26 (Reuters) - Russia and the United States are expected to exchange notes on extending the New START nuclear arms control treaty very soon, TASS news agency reported on Tuesday, citing sources.

The pact, signed in 2010 and set to expire next month, limits the numbers of strategic nuclear warheads, missiles and bombers that Russia and the United States can deploy. (Reporting by Polina Devitt; Writing by Gabrielle Tétrault-Farber; Editing by Franklin Paul)