White House spokeswoman Sarah Sanders made the allegation on Thursday after President Vladimir Putin announced an array of new nuclear weapons, saying they could hit almost any point in the world and evade a U.S.-built missile shield.
Kremlin spokesman Dmitry Peskov told reporters on a conference call on Friday that Russia categorically denied it was in breach of any international arms control pacts.
The White House said U.S. President Donald Trump discussed Putin's statements on nuclear weapons in separate phone calls with German Chancellor Angela Merkel and French President Emmanuel Macron on Thursday.
The leaders "shared their serious concerns" about the statements and agreed they "detract from productive discussion of a range of issues between Russia and the West," the White House said.
Peskov rejected an assertion that Putin's speech, one of his most bellicose in years, would deepen Russia's international isolation and said it did not herald the start of a new arms race.
"Russia does not plan to get dragged into any arms race," said Peskov.
(Reporting by Polina Nikolskaya and Polina Devitt; Additional reporting by Eric Beech in Washington; Editing by Andrew Osborn and James Dalgleish)
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