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. <br />''<br />''In a statement, Kremlin said that Mr. 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.<br />''<br />''<span style="color: #222222;">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. </span>