Military solutions 'locked and loaded' against North Korea threat: Donald Trump

But China, North Korea's only major ally, has been urging restraint.

US President Donald Trump has offered a fresh threat of force against North Korea, writing on Twitter that "military solutions are now fully in place, locked and loaded" if the regime of Kim Jong-un should "act unwisely".

"It is scary because I lived through the second world war and I certainly don't want to see another one", she says.

"Maybe it wasn't tough enough", Trump said during a lengthy exchange with reporters.

The two leaders spoke overphone to discuss the escalating tension after Kim threatened the U.S. this week to fire missiles at Guam, a USA island territory, after the United States sponsored a resolution imposing new economic sanctions on Pyongyang over its missile and nuclear weapons programmes.

"He does something in Guam, it will be an event the likes of which nobody's seen before, what will happen in North Korea", Trump told reporters in New Jersey, without offering specifics.

North Korea has responded to those sanctions with increased aggression, escalating Wednesday to a threat to attack waters near the US territory of Guam.

Russian Foreign Minister Sergei Lavrov said the risk of a military clash between Washington and Pyongyang was "very high", and he added that language fueling the tensions was "over the top".

Despite the rhetoric, USA officials said there was no major movement of US military assets to the region, nor were there signs Pyongyang was actively preparing for war.

DPRK stands for North Korea's official name, the Democratic People's Republic of Korea.

Pyongyang, meanwhile, said almost 3.5 million North Koreans had volunteered to join or rejoin the People's Army since the United Nations imposed new sanctions over its missile tests and nuclear ambitions.

Pyongyang's state-run KCNA news agency said Thursday that the country's army would finalize plans later this month to fire intermediate-range missiles from North Korea to near Guam, Reuters reported. "I think China can do a lot more, yes, and I think China will do a lot more".

The rhetoric remains consistent with Trump's comments throughout the past week. As a precaution, Japan deployed missile defense batteries under the path a North Korean missile might take.

The streets of Pyongyang also reportedly remain calm amid rising tension in the region.

In a statement Saturday, Macron said the situation "undermines the preservation of global peace" and the North Korean regime "poses a serious threat to the security of its neighbors".

Terence Roehrig, a national security affairs professor at the US Naval War College in Newport, Rhode Island, said Trump's posture suggested he was trying to dissuade Kim from further provocations rather than setting the stage for a US military strike. Pyongyang says it will be ready to send its missile launch plan to Kim for approval just before or as the drills begin.

Editorial warns that China would seek to stop United States and South Korea from any effort at regime change in Pyongyang. "Fight tonight" has long been the motto of USA forces in South Korea to show they're always ready for combat on the Korean Peninsula.

Russian Federation and Germany have also urged both sides to tone down the rhetoric. "Those words are very, very easy to understand", the president said. Security Council to continue to address the crisis.

German Chancellor Angela Merkel said there was no military solution, and "an escalation of the rhetoric is the wrong answer".

"Let her speak for Germany", Trump said, when asked about the comment.