The three-day trip will be Lee's first to Russia as prime minister.

During the visit, Lee plans to deliver a keynote speech at the forum to outline the New Northern Policy by which the government of President Moon Jae-in is seeking to strengthen relations with Russia, Mongolia and other northern countries.

Lee will also attend a forum of business people of the two countries, the office said.

During a meeting with Putin on Wednesday, Lee plans to discuss ways to further strengthen bilateral relations and increase cooperation in efforts to bring permanent peace to the Korean Peninsula. The two sides are also expected to check on how June's summit agreement between Moon and Putin is being implemented, his office said.

Lee also plans to hold meetings with Abe and Battulga on Tuesday. (Yonhap)