“We believe that difficult times are ahead in relations with Russia, because there are a number of issues on which our positions differ deeply, as well as a number of actions that we need to answer decisively.

We also believe that we can work with Russia on key issues on the agenda, including nuclear ones, within which a few weeks ago we extended the START Treaty for another five years, ”RIA Novosti quoted him as saying.

He noted that future relations between Russia and the United States "will not be easy."

“They will be fraught with serious challenges,” he added.

In February, the Russian Foreign Ministry announced the start of the procedure for coordinating inspections within the framework of the START Treaty.