Russian Foreign Minister Sergey Lavrov on Friday called on North Korea to return as soon as possible to the stalled talks on nuclear disarmament, the ITAR-Tass news agency reported. "We should do our utmost to secure North Korea's return to the format of the six-party talks," Lavrov was quoted as saying after talks with South Korean Defense Minister Yoon Kwang-ung. "All countries, first of all those bordering on this region at risk of conflict, are interested in this."