US Secretary of State Rubio doubts Russia's seriousness in resolving the conflict.
The negotiations on Ukraine have narrowed the range of issues that are hindering a settlement, but the most difficult questions remain.
US Secretary of State Rubio stated this while speaking at the Munich Security Conference.
“We don't know if Russia is serious about resolving the conflict in Ukraine,” added Rubio, who has not been involved in the negotiating process recently.
