The diplomat was speaking at a meeting of the Federation Council’s international affairs committee, which discussed the bill on the suspension of the plutonium disposal agreement with the United States, TASS wrote.

Read alsoReuters: Russia says U.S. actions threaten its national security"The U.S. policy of sanctions towards Russia has continued for a long time. We have used this period to do some research and to reserve a series of measures that might be used asymmetrically if the sanctions regime is tightened further," he said.