The BBC is reporting that North Korea has fired another missile:
North Korea has fired a missile eastwards from its capital, Pyongyang, towards Japan, media reports say.
Japan said that the missile likely passed over its territory and has warned residents to take shelter, local media report.
South Korea and the US are analysing the details of the launch, the South's military said.
Al Jazeera reports:
The projectile was launched at 6:57am (21:57GMT Thursday) and flew over the northern Japanese island of Hokkaido before falling into the Pacific Ocean - 2,000km east of Cape Erimo, said Japan's Chief Cabinet Secretary Yoshihide Suga.
"Japan protests the latest launch in the strongest terms and will take appropriate and timely action at the United Nations and elsewhere, staying in close contact with the United States and South Korea," Suga told reporters.
South Korea's defence ministry said the missile travelled about 3,700km and reached a maximum altitude of 770km - both higher and further than previous tests.
Just more saber rattling? Another step in escalation? What's next?
North Korea's defiant pursuit of nuclear weapons capabilities, dramatised by last weekend's powerful underground test and a recent long-range ballistic missile launch over Japan, has been almost universally condemned as posing a grave, unilateral threat to international peace and security.
The growing North Korean menace also reflects the chronic failure of multilateral counter-proliferation efforts and, in particular, the long standing refusal of acknowledged nuclear-armed states such as the US and Britain to honour a legal commitment to reduce and eventually eliminate their arsenals.
In other words, the past and present leaders of the US, Russia, China, France and the UK, whose governments signed but have not fulfilled the terms of the 1970 nuclear non-proliferation treaty (NPT), have to some degree brought the North Korea crisis on themselves. Kim Jong-un's recklessness and bad faith is a product of their own.
The NPT, signed by 191 countries, is probably the most successful arms control treaty ever. When conceived in 1968, at the height of the cold war, the mass proliferation of nuclear weapons was considered a real possibility. Since its inception and prior to North Korea, only India, Pakistan and Israel are known to have joined the nuclear "club" in almost half a century.
To work fully, the NPT relies on keeping a crucial bargain: non-nuclear-armed states agree never to acquire the weapons, while nuclear-armed states agree to share the benefits of peaceful nuclear technology and pursue nuclear disarmament with the ultimate aim of eliminating them. This, in effect, was the guarantee offered to vulnerable, insecure outlier states such as North Korea. The guarantee was a dud, however, and the bargain has never been truly honoured.
[Ed Note: Since this story was submitted there has been at least one additional ballistic missile test by North Korea.]