“There will be very difficult contacts in the next few days at the expert level in order to fix the agreement on the extension,” he said in an interview with the Big Game program on Channel One.
The Kremlin spokesman urged to refrain from statements that could provide "food for misunderstandings."
He called this topic "extremely difficult in terms of a huge number of serious disagreements."
Previously, Peskov expressed hope that an agreement would be reached with Washington to extend the START Treaty for a year.