North Korea says it has arrested a US student accused of committing a "hostile act" against the state. State news agency KCNA identifies him as University of Virginia student Otto Frederick Warmbier.

A US long-range heavy bomber flew over South Korea, the US military says, days after North Korea conducted its first alleged hydrogen bomb test in defiance of international sanctions.

Expressing concern at the recent nuclear tests carried out by the North Korea, Bangladesh urges the country to refrain from any activity which can potentially escalate the situation.

The North Korean authorities say they have successfully tested a hydrogen bomb amid reports of a tremor near the main nuclear test site.

A top aide to the North Korean leader Kim Jong-un has died in a car crash, state news agency KCNA has said.

A North Korean diplomat has been expelled from South Africa for illegal rhino horn trading, according to a spokesman for South Africa's Department of International Relations.

Twitter has sent warnings to a number of users that their accounts may have been hacked by "state-sponsored actors".

Japanese police arrest a South Korean man suspected of bombing Tokyo's controversial Yasukuni shrine.

The US has imposed new sanctions on North Korea over its alleged weapons proliferation activities.

Officials from North and South Korea are meeting for rare talks aimed at improving long-strained ties, after a military standoff in August.

United Nations Secretary General Ban Ki-moon will visit North Korea this week, according to South Korean news agency Yonhap.

Several countries have used a United Nations forum to criticise Australia's asylum seeker policies.

South Korea's navy fire shots at a North Korean boat that strayed into its waters, the Yonhap news agency reports.

Hundreds of South Koreans travelling to the North for a rare reunion with family members whom they were separated from by the Korean War.

North Korea is to hold what is expected to be one of its biggest celebrations, marking the 70th anniversary of the ruling Workers' Party.

The planned hanging of a paraplegic prisoner in Pakistan has been delayed, his lawyer says.

North Korea says its main nuclear facility, Yongbyon complex, is now in "full operation".

North and South Korea agree to hold rare reunions for families separated by the Korean War.

South Korea halts its propaganda broadcasts into North Korea as part of a deal to defuse tension.

North Korean leader Kim Jong-un orders his frontline troops to be on a war footing after an exchange of fire with the South across their heavily fortified border.