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 US-built missile shield, Reuters reported.
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.
Peskov also 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.