Moscow will not leave Washington’s decision to unilaterally withdraw from the landmark nuclear arms treaty unanswered, Russian President Vladimir Putin said, adding that the country doesn’t need to join another arms race.

Russia is still ready to continue dialog with the US on the bilateral treaty banning medium-range missiles, which has become one of the cornerstones of nuclear disarmament, the Russian leader said at a government meeting in Sochi. Still, the US should “treat this issue with full responsibility,” the president said, adding that Washington’s decision to withdraw from the agreement “cannot and will not be left unanswered.”