"A number of pressing issues in the field of arms control and non-proliferation of WMD was discussed, as well as separate topics related to the interaction among five nuclear weapon states designated by the Treaty on the Non-Proliferation of Nuclear Weapons," the ministry said.
Earlier in the day, Ryabkov told reporters that he had discussed with Gottemoeller, US State Department under secretary for arms control and international security, the downing of a Russian warplane over Syria by NATO member-state Turkey.
On Tuesday, a Russian Su-24 jet crashed in Syria. Russian President Vladimir Putin said that the plane was downed by an air-to-air missile launched by a Turkish F-16 jet over Syrian territory, and fell 4 kilometers (2.5 miles) from the Turkish border.
One of the two Su-24 pilots was killed by fire from the ground after ejecting from the plane and a Russian naval infantry soldier was killed during the rescue operation.
Turkish President Recep Tayyip Erdogan said that Turkey acted in line with its sovereign right to respond to threats, claiming that the Russian jet had violated Turkish airspace.
Putin described the Turkish attack as a "stab in the back" carried out by "accomplices of terrorists."
