Russia said on Thursday it was clear the US was not willing to address its main security concerns, but kept the door open for further dialogue in their standoff over Ukraine.

Kremlin spokesman Dmitry Peskov said Moscow, which has built up its forces near Ukraine, would not rush to draw conclusions after Washington responded on Wednesday to Russian proposals for a redrawing of post-Cold War security arrangements in Europe.

Describing tensions in Europe as reminiscent of the Cold War, Peskov said Moscow needed time to review the US written response but US and Nato statements that Russia’s main demands were unacceptable did not leave much room for optimism.

“Based on what our colleagues said yesterday, it’s absolutely clear that on the main categories outlined in those draft documents... we cannot say that our thoughts have been taken into account or that a willingness has been shown to take our concerns into account,” he said.

The nuanced Kremlin reaction made clear that Russia was not rejecting the US and Nato responses out of hand or closing the door to diplomacy.

The Russian foreign ministry said the best way to reduce tensions was for Nato to withdraw forces from eastern Europe.