FILE PHOTO: Russian Deputy Foreign Minister Sergei Ryabkov looks on at the start of two days of closed-door nuclear talks at the United Nations offices in Geneva October 15, 2013. REUTERS/Fabrice Coffrini/Pool

MOSCOW (Reuters) - Russia is working on retaliatory measures against the United States after it imposed sanctions on a Russian company for aiding North Korea, Deputy Foreign Minister Sergei Ryabkov was quoted as saying by Interfax news agency on Thursday.

Washington sanctioned Russian-based Profinet Pte Ltd and its director general, Vasili Aleksandrovich Kolchanov, on Wednesday for providing port services on at least six occasions to North Korean-flagged ships.

Ryabkov said a decision on a response would be taken by the country’s leadership.