<p>Seoul: Senior officials of South Korea and the United States held an emergency phone call over a possible impending visit by Russian President Vladimir Putin to North Korea, Seoul's foreign ministry said on Friday.</p><p>South Korea's vice foreign minister, Kim Hong-kyun, in the phone call with US Deputy Secretary of State Kurt Campbell, said that Putin's visit should not result in deeper military cooperation between Pyongyang and Moscow in violation of UN Security Council resolutions, the ministry said.</p>.North Korea's Kim boasts of 'invincible' ties with Russia amid talks of Putin visit.<p>Echoing Kim's concerns, Campbell pledged continued cooperation to tackle potential regional instability and challenges caused by the trip.</p><p>A senior official at Seoul's presidential office said on Wednesday that Putin was expected to visit North Korea "in the coming days". </p>
<p>Seoul: Senior officials of South Korea and the United States held an emergency phone call over a possible impending visit by Russian President Vladimir Putin to North Korea, Seoul's foreign ministry said on Friday.</p><p>South Korea's vice foreign minister, Kim Hong-kyun, in the phone call with US Deputy Secretary of State Kurt Campbell, said that Putin's visit should not result in deeper military cooperation between Pyongyang and Moscow in violation of UN Security Council resolutions, the ministry said.</p>.North Korea's Kim boasts of 'invincible' ties with Russia amid talks of Putin visit.<p>Echoing Kim's concerns, Campbell pledged continued cooperation to tackle potential regional instability and challenges caused by the trip.</p><p>A senior official at Seoul's presidential office said on Wednesday that Putin was expected to visit North Korea "in the coming days". </p>