North Korea unveiled what appears to be launch tubes for a new intercontinental ballistic missile (ICBM) during a military parade in the capital of Pyongyang to celebrate the 105th birthday of the country's late founder Kim Il Sung, South Korea's military said Saturday.
Pukguksong submarine-launched ballistic missiles (SBLM) were also on parade - the first time North Korea has shown off the weapons which are said to have a range of more than 1,000 kilometres and are hard to detect.
With concerns that the state is getting closer to successfully producing a nuclear arsenal, Saturday's parade was an opportunity for Mr Kim to broadcast North Korea's current military capabilities.
That raised questions about U.S. President Donald Trump's plans for North Korea, which has conducted missile and nuclear tests in defiance of United Nations and unilateral sanctions. United States media claimed that President Donald Trump may order a strike against North Korea in case Pyongyang decides to carry out another nuclear weapon test.
China quickly responded to the new jousting in the nuclear hotspot, saying there will be no victor in a war between the USA and North Korea.
"All the brigandish provocative moves of the USA in the political, economic and military fields pursuant to its hostile policy toward the DPRK will thoroughly be foiled through the toughest counteraction of the army and people of the DPRK", the KCNA state news agency said, citing a spokesman for the General Staff of the Korean People's Army.
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Kim Jong Un didn't speak before North Korean television ended the live broadcast.
North Korea showed two new kinds of ICBM enclosed in canister launchers mounted on the back of transporter erector launcher trucks, or TELs.
USA aircraft carrier Carl Vinson, surrounded by a fleet of United States warships, was sent toward the Korean Peninsula in advance of this weekend's festivities in Pyongyang.
The move, coupled with the US retaliatory strikes against Syria over a chemical weapons attack on civilians, touched off fear in South Korea that the United States was preparing for military action on the North.
Pyongyang has also expressed anger over the ongoing annual spring military exercises the USA holds with South Korea, which it considers a rehearsal for invasion.
Chinese Foreign Minister Wang Yi fears a conflict could break out "at any moment" and has warned there would be "no winner". Any preemptive strike on the United States' part would use conventional weapons, rather than nuclear, the officials said.