The recently signed mutual defense treaty could be used to justify thewidening of the war in Ukraine, as the U.S. says North Korean and Russian troops are already battling Ukrainian forces.

The U.S. says 8,000 North Korean soldiers are in Russia preparing to fight against Ukrainian troops in the coming days.

North Korea confirmed the launch hours after its neighbors detected the firing of what they suspected was a new weapon.

Russian President Vladimir Putin neither confirms nor denies the presence of North Korean troops in Ukraine. Putin’s comments came during a press conference at a Russian-hosted summit for the world’s top developing economies.

So far, South Korea has helped Ukraine by providing arms to the U.S. and other countries. But South Korea's government said that could change with North Korean troops deploying for Russia.

The deployment raises the potential for the North Koreans to join Russian forces in Ukraine and suggests expanded military ties between the two nations as Moscow seeks weapons and troops.

Destroying the roads would be in line with Kim Jong Un's push to cut off ties with South Korea and abandon the decades-long objective to seek a peaceful unification.

Travis King’s attorney says the U.S. Army private intends to admit guilt to a total of five military offenses, including desertion and assaulting an officer.

The players had just received their medals for the mixed doubles competition in table tennis when one of the South Korean athletes produced a cellphone for a modern Olympic tradition: a group photo at the podium.

South Korea’s spy agency said Tuesday that a senior North Korea diplomat based in Cuba has fled to South Korea, the latest defection by members of the North's ruling elite that likely hurt leader Kim Jong Un's push to bolster his leadership.

On the 74th anniversary of the start of the Korean War, the residents of Abai Village, in the coastal South Korean city of Sokcho, reflect on what their community still means to them.

Vladimir Putin and Kim Jong Un signed a treaty upgrading their relationship and pledging military assistance if either one is attacked, drawing criticism from NATO, South Korea and other countries.

As Russia's leader visits North Korea, Johns Hopkins professor Sergey Radchenko offers insights into the fascinating history of twists and turns in relations between Moscow and Pyongyang.

While Sunday's incident happened amid simmering tensions between the two Koreas, observers say it won't likely develop into another source of animosity.

South Korea’s presidential national security council said it has decided to suspend a 2018 inter-Korean agreement aimed at easing animosities, until mutual trust between the two Koreas is restored.