Japan says it reached an altitude of 2,000km which, if confirmed, could show a technological advance.
The US defence secretary says the US is working with China to reduce tensions.
After North Korea tested its latest missile, the BBC’s John Sudworth reports from Pyongyang.
The US confirms Pyongyang’s attempt to fire a ballistic missile, which it says blew up immediately.
Its ambassador to the UN says America will not stand by when chemical weapons are used.
Cruise missiles hit an air base the US believes launched Tuesday’s suspected chemical weapons attack.
The launch comes as the Chinese and US leaders prepare to discuss the North’s missile programme.
In exchange, the US and South Korea should end military drills, says Foreign Minister Wang Yi.
North Korea confirmed the test of a “surface-to-surface medium-to-long-range ballistic missile”.
US President Trump pledges “100%” backing for Japan, after missile was fired towards its territory.