She said that she had delivered a message to Deputy Minister of Foreign Affairs of Russia Sergey Ryabkov during the negotiations on the situation around the INF Treaty, which took place on January 15 in Geneva.
"We left them a letter outlining what they needed to take in order to return to compliance (PRSDM. - RT )," Thasson quoted TASS.
However, she added that the letter does not contain new information.
Earlier, Ryabkov, at briefings for foreign diplomats, announced the unacceptability of US ultimatums on the INF.