North Korea test-fired a barrage of short-range ballistic missiles from multiple locations towards the sea on Sunday, South Korea’s military said. The move extended a provocative streak in weapons demonstrations this year that US and South Korean officials say may culminate in a nuclear test explosion. Possibly setting a single-day record for North Korean ballistic launches, eight missiles were fired in succession over 35 minutes from at least four different locations, including from western and eastern coastal areas and two inland areas north of and near the capital, Pyongyang, South Korea’s Joint Chiefs of Staff said. It said the missiles flew 68 to 416 miles (110km to 670km) at maximum altitudes of 15 to 56 miles (25km to 80km). People watch a TV news programme reporting North Korea’s missile launch (Lee Jin-man/AP) South Korean Joint Chiefs of Staff Chairman General Won In-Choul held a video conference about the launches with General Paul LaCamera, an American general who heads the South Korea-US combined forces command in Seoul, and they reaffirmed the allies’ joint defence stance, the JCS said in a statement. Sung Kim, US President Joe Biden’s special envoy for North Korea, also discussed the launches with South Korean officials while on a visit to Seoul. They expressed “deep regret” that North Korea is continuing weapons development despite grappling with a Covid-19 outbreak at home, Seoul’s Foreign Ministry said. Japanese Defence Minister Nobuo Kishi said none of the missiles fell inside Japan’s exclusive economic zone. The launches came a day after the US aircraft carrier Ronald Reagan concluded a three-day naval drill with South Korea in the Philippine Sea, apparently their first joint drill involving a carrier since November 2017, as the countries move to upgrade their defence exercises in the face of North Korean threats. South Korean President Yoon Suk Yeol (centre) attends a National Security Council meeting in Seoul (South Korea Presidential Office/AP) North Korea has long condemned the allies’ combined military exercises as invasion rehearsals and often countered with its own missile drills, including short-range launches in 2016 and 2017 that simulated nuclear attacks on South Korean ports and US military facilities in Japan. Discussing the launches with his national security officials, South Korean President Yoon Suk Yeol lamented that North Korea has been firing missiles at a pace of once every nine days this year. He vowed to strengthen the country’s defence in co-operation with the United States, according to his office. The launches marked North Korea’s 18th round of missile tests in 2022 alone — a streak that has included the country’s first demonstrations of intercontinental ballistic missiles in nearly five years. Experts say North Korean leader Kim Jong Un wants to force the United States to accept the idea of the North as a nuclear power and negotiate economic and security concessions from a position of strength. South Korean and US officials say there are signs that North Korea is also pressing ahead with preparations at its nuclear testing ground in the north-eastern town of Punggye-ri. The North’s next nuclear test would be its seventh since 2006 and the first since September 2017, when it claimed to have detonated a thermonuclear bomb to fit on its ICBMs. North Korea test-fired a salvo of multiple short-range ballistic missiles towards the sea on Sunday, South Korea’s military said (Lee Jin-man/AP) On Friday, US envoy Sung Kim aid Washington is “preparing for all contingencies” in close co-ordination with its Asian allies. The United States has vowed to push for additional international sanctions if North Korea conducts a new nuclear test, but the prospects of further UN Security Council measures appear slim. Russia and China vetoed a US-sponsored resolution that would have imposed additional sanctions on North Korea over its latest ballistic tests on May 25, which South Korea’s military said involved an ICBM on a medium-range trajectory and two short-range weapons. Those tests came as Mr Biden wrapped up his trip to South Korea and Japan, where he reaffirmed America’s commitment to defend both allies. In March, North Korea launched an ICBM almost straight up at a full-range and saw it fly higher and longer than any weapon it had ever tested, demonstrating the potential to reach the entirety of the US mainland. While Mr Kim’s ICBMs have garnered much international attention, he has also spent the past three years expanding his arsenal of shorter range solid-fuel missiles threatening South Korea and Japan. He has punctuated his tests with repeated comments that the North would use its nuclear weapons proactively when threatened or provoked, which experts say portend an escalatory nuclear doctrine that may create greater concerns for neighbours. North Korean leader Kim Jong Un has shown no willingness to fully surrender an arsenal he sees as his strongest guarantee of survival (Korean Central News Agency/Korea News Service/AP) Nuclear negotiations between Washington and Pyongyang have stalled since 2019 over disagreements in exchanging the release of crippling US-led sanctions for the North’s disarmament steps. Despite deepening economic woes, Mr Kim has shown no willingness to fully surrender an arsenal he sees as his strongest guarantee of survival and is clearly trying to convert the dormant denuclearisation talks into a mutual arms reduction negotiation with the United States, experts say. The North Korean leader’s pressure campaign comes as the country deals with a deadly Covid-19 outbreak across his largely unvaccinated autocracy that lacks public health tools. GAVI, the non-profit organisation which runs the UN-backed Covax distribution programme, said on Friday that it understands North Korea has accepted an offer of vaccines from ally China and has started to administer doses. It was not immediately clear how many doses of which vaccines the North has received or how the country is rolling them out.