Russian President Vladimir Putin has officially suspended the country’s participation in a key Cold War-era nuclear arms-control treaty with the United States.

In a statement, Kremlin said that Putin signed a decree regarding the suspension of Russia’s participation in the Intermediate-Range Nuclear Forces, INF treaty between the USSR and the US in 1987. It said that the move was taken following a violation of the United States of its obligations under the treaty.

Moscow and Washington have accused one another of breaching the INF treaty. Meanwhile, NATO has said that US allies fully support its withdrawal from the pact, insisting that Russia’s ground-launched cruise missile systems violate the treaty.