MOSCOW, December 22. /TASS/. Moscow still has serious questions for the United States about Ukraine, but the administration of US President Donald Trump has taken some steps in the right direction, Russian Deputy Foreign Minister Sergey Ryabkov said at a Valdai discussion.

He said that if Washington resumes nuclear weapons tests, Moscow will react in a mirror manner. Russia is ready to ensure its national security, including through the adoption of military-technical countermeasures.

TASS has compiled the key statements of the Russian deputy foreign minister.

Russia still has serious questions for the United States over Ukraine, but the Trump administration has taken some "significant steps in the right direction."

Normalization of relations between the United States and Russia "will require a lot of time, a genuine desire from both sides and tremendous work."