Defying calls to rein in its weapons programme, North Korea has fired a ballistic missile which landed in the sea near Russia.
The US military's Pacific Command said it was assessing the type of missile that was fired on Sunday but it was "not consistent with an intercontinental ballistic missile" and the threat assessment has not changed.
Japanese Defence Minister Tomomi Inada said the missile could be a new type. It flew for 30 minutes, or 700km reaching a height of more than 2000km, before dropping into the sea.
A US official, speaking on condition of anonymity, said the missile landed 97km south of Russia's Vladivostok region, prompting the White House to reference Moscow in a statement about the incident.
"With the missile impacting so close to Russian soil - in fact, closer to Russia than to Japan - the President cannot imagine that Russia is pleased," the White House said.
North Korea is widely believed to be developing an intercontinental missile tipped with a nuclear weapon that can reach the US. US President Donald Trump has vowed not to let that happen.
"The launch may indeed represent a new missile with a long range," said Jonathan McDowell of the Harvard Smithsonian Center for Astrophysics, referring to the estimated altitude of more than 2000km. "It is definitely concerning."
Russian President Vladimir Putin and Chinese President Xi Jinping discussed the situation, including the latest missile launch, and expressed "mutual concerns" about growing tensions.
South Korean President Moon Jae-in held his first National Security Council in response to the launch, which he called a "clear violation" of UN Security Council resolutions, his office said.
"The President said while South Korea remains open to the possibility of dialogue with North Korea, it is only possible when the North shows a change in attitude," Yoon Young-chan, Moon's press secretary, told a briefing.
China, North Korea's sole ally, although it objects to the weapons program, called for restraint and for no one to exacerbate tension.
Japanese Prime Minister Shinzo Abe said North Korea's missile launches were a "grave threat to our country and a clear violation of UN resolutions".
Trump said in an interview with Reuters in April that a "major, major conflict" with North Korea was possible but he would prefer a diplomatic outcome.
Trump has also said he would be "honoured" to meet North Korean leader Kim Jong Un under the right circumstances.
On Saturday, a top North Korean diplomat said Pyongyang was open to dialogue with the Trump administration under the right conditions.
But Nikki Haley, the US ambassador to the UN, told ABC's This Week on Sunday that "having a missile test is not the way to sit down with the president, because he's absolutely not going to do it".
Ms Haley said that Kim "can sit there and say all the conditions he wants. Until he meets our conditions, we're not sitting down with him".