North Korea test-fired a new "long-range cruise missile" over the weekend, state media reported Monday, with the United States saying the nuclear-armed country was threatening its neighbours and beyond.
Pictures in the Rodong Sinmun newspaper showed a missile exiting one of five tubes on a launch vehicle in a ball of flame, and a missile in horizontal flight.
Such a weapon would represent a marked advance in North Korea's weapons technology, analysts said, better able to avoid defence systems to deliver a warhead across the South or Japan -- both of them US allies.
The test launches took place on Saturday and Sunday, the official Korean Central News Agency said.
The missiles travelled 1,500-kilometre (about 930 miles), two-hour flight paths -- including figure-of-8 patterns -- above North Korea and its territorial waters to hit their targets, according to KCNA.
Its report called the missile a "strategic weapon of great significance", adding the tests were successful and it gave the country "another effective deterrence means" against "hostile forces".
North Korea is under international sanctions for its nuclear weapons and ballistic missile programmes, which it says it needs to defend against a US invasion.
But Pyongyang is not banned from developing cruise missiles, which it has tested previously.
As described, the missile "poses a considerable threat", Park Won-gon, professor of North Korean Studies at Ewha University, told AFP.
"If the North has sufficiently miniaturised a nuclear warhead, it can be loaded onto a cruise missile as well," Park said.
"It's very likely that there will be more tests for the development of various weapons systems."
The launch was a response to joint South Korea-US military drills last month, he said.
But Chinese Foreign Minister Wang Yi is due in Seoul on Tuesday and Park added: "By choosing cruise missiles, North Korea is trying not to provoke the US and China too much."
Jeffrey Lewis of the Middlebury Institute for International Studies tweeted that the reported missiles would be capable of delivering a warhead against targets "throughout South Korea and Japan".
"An intermediate-range land-attack cruise missile is a pretty serious capability for North Korea," he added.
"This is another system that is designed to fly under missile defence radars or around them."
- 'Significant concerns' -
The South Korean military -- normally the first source of information on the North's missile tests -- had made no announcement of any launches over the weekend.
They said they were analysing developments, while Tokyo's chief government spokesman Katsunobu Kato told reporters that a 1,500-km range missile "would pose a threat to the peace and security of Japan and the surrounding region".
"Japan has significant concerns," he added.
In a statement, the US Indo-Pacific Command said the reports highlighted North Korea's "continuing focus on developing its military programme and the threats that poses to its neighbours and the international community".
It reiterated that the US commitment to defend South Korea -- where it stations around 28,500 troops to protect it against its neighbour -- and Japan "remains ironclad".
The reported launches are the first since March by North Korea, which has not carried out a nuclear test or an intercontinental ballistic missile launch since 2017.
They came days after a scaled-back parade in Pyongyang to mark the 73rd anniversary of the country's founding.
Nuclear talks with the United States have been stalled since the collapse of a 2019 summit in Hanoi between North Korean leader Kim Jong Un and then-president Donald Trump over sanctions relief -- and what Pyongyang would be willing to give up in return.
Current US President Joe Biden's North Korea envoy, Sung Kim, has repeatedly expressed his willingness to meet his Pyongyang counterparts "anywhere, at any time".
But the impoverished North has never shown any indication it would be willing to surrender its nuclear arsenal, and has rebuffed South Korean efforts to revive dialogue.
Last month, the UN atomic agency (IAEA) said Pyongyang appeared to have started its plutonium-producing reprocessing reactor at Yongbyon, calling it a "deeply troubling" development.
Kim's sister and key adviser Kim Yo Jong also demanded the withdrawal of US troops from the peninsula.
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