Russia will ask NATO to clarify whether it intends to implement key security commitments, Foreign Minister Sergey Lavrov said on Sunday, after Moscow said the alliance's response to its demands did not go far enough.
Russia has forced the U.S.-led defence alliance and the 57-member Organization for Security and Cooperation in Europe to negotiate over regional security by massing around 100,000 troops near Ukraine while denying it plans to invade.
