South Korean art troupe arrives in Pyongyang

North Korea appears to have restarted activities at its main plutonium-producing reactor in Yongbyon, the UN atomic agency, IAEA, has said in an annual report. The apparent resumption of operations comes as Pyongyang has been voicing threats to expand its nuclear arsenal amid continued tensions with the United States.

North Korea escapee Hiroko Saito says she and 97,000 others were deceived into relocating to the North in the 1960s with promises of "paradise on Earth." Instead, she suffered starvation, repression and loss.

South Korea's ministry of defence releases footage of a successful a submarine ballistic missile launch, making the country the seventh in the world with the advanced technology and raising the prospect of a regional arms race. The test, supervised by President Moon Jae-in, comes hours after nuclear-armed North Korea fired two ballistic missiles into the sea, according to the South's military, and as China's foreign minister visited Seoul.

Pyongyang has said it would take action if a new Indo-Pacific alliance between the US, Australia and the UK had "even the smallest negative effect" on North Korea's security.

South Korea has said the North fired an unidentified projectile as Pyongyang's UN envoy defended the rogue country's right to test weapons. North Korea is currently under UN sanctions banning weapons tests.

North Korea's ambassador to the UN tells the General Assembly that "nobody can deny" the nuclear-armed country the right to test weapons. Kim Song's comments at the world body headquarters in New York come just moments after South Korea's military said the North had fired an "unidentified projectile" into the sea off its east coast.

Pyongyang last cut off the hotline in August after joint US-South Korea military drills. The move comes amid a series of weapons tests by the North.

North Korean leader Kim Jong Un said the US is the "root cause" of instability on the Korean Peninsula. He said Pyongyang is only increasing its military capabilities as a deterrent.

The military in South Korea has said the projectile was a submarine-launched ballistic missile. It comes as intelligence chiefs from the US, South Korea and Japan meet in Seoul.

North Korea has confirmed that it tested a new type of submarine-launched ballistic missile on Tuesday, making it the fifth in a round of missile tests by the country since September.

South Korea has launched its first domestically developed space rocket but failed to put its dummy payload into orbit, a setback in the country's attempts to join the ranks of advanced space-faring nations.