South Korea's president arrived in Moscow on Sunday for a three-day visit expected to focus on the international standoff over North Korea's nuclear programme and energy ties. South Korean President Lee Myung-Bak landed at Moscow's Sheremetyevo airport at 1:30 pm (1530 PST). Lee is scheduled to meet his Russian counterpart Dmitry Medvedev and Prime Minister Vladimir Putin on Monday, news agencies reported earlier, citing the South Korean embassy in Moscow. His visit comes days after the UN's atomic energy watchdog said Pyongyang was about to restart a nuclear reprocessing plant and Seoul's foreign minister warned that six-party talks aimed at disarming North Korea were near breakdown.