North Korean leader Kim Jong-Un said on Wednesday his country had achieved full nuclear statehood after what he said was the successful test of a new missile capable of striking anywhere in the United States.
The intercontinental ballistic missile (ICBM) launch snapped a two-month pause in testing by the North and poses a new challenge to US President Donald Trump who has vowed such a capability "won't happen."
North Korean state television brought out Ri Chun-Hee, a star presenter who only appears for significant developments, to announce the landmark.
"Kim Jong-Un declared with pride that now we have finally realised the great historic cause of completing the state nuclear force, the cause of building a rocket power," she said.
"The great success in the test-fire of ICBM Hwasong-15 is a priceless victory won by the great and heroic people of the DPRK," she said, using the official abbreviated name for North Korea.
Wednesday's missile was more sophisticated than any previously tested, state media said.
"The ICBM Hwasong-15 type weaponry system is an intercontinental ballistic rocket tipped with super-large heavy warhead which is capable of striking the whole mainland of the US," the North's official news agency KCNA said.
Pyongyang said the missile reached an altitude of 4,475km and splashed down 950km from its launch site.
At least one Western expert said the missile's lofted trajectory suggested an actual range of 13,000km, enough to hit every major US city.
Trump, who recently announced fresh sanctions on Pyongyang and returned it to a US list of state sponsors of terror, was opaque in his immediate response, as the UN Security Council agreed to meet in an emergency session.
"I will only tell you that we will take care of it," Trump said at the White House. "It is a situation that we will handle," he added, without elaborating.
Russia called the launch "provocative" and China, North Korea's sole major ally and diplomatic protector expressed "grave concern and opposition."
Beijing once again pressed its proposal that the North stop missile and nuclear tests in exchange for a freeze of US military exercises.
Washington has repeatedly rejected the suggestion.
Wednesday's launch was the North's third successful ICBM test.
David Wright, an arms control expert and co-director at the Union of Concerned Scientists, said the flight parameters pointed to a missile with "more than enough range to reach Washington DC, and in fact any part of the continental United States."
There were scenes of jubilation in tightly controlled Pyongyang, where residents gathered in front of a large screen to watch the news.
Jang Kwang Hyok, 32, said the test posed a question for the US president.
"I just want to ask a question to Trump: 'Can you still dare to backbite about our country?' 'Can you continue to do it even when Hwasong-15 is fired to the US mainland?'," he said.
While Pyongyang has yet to prove its mastery of the re-entry technology required to bring a warhead back through the Earth's atmosphere, experts believe it is at least on the threshold of developing a working intercontinental nuclear strike capability.
Wednesday's statement from the North stressed the notion it had become a fully fledged nuclear power and offered language redolent of a "no first strike" doctrine.
Its weapons "would not pose any threat to any country and region as long as the interests of the DPRK are not infringed upon. This is our solemn declaration," state media said.