North Korea's Supreme Leader Kim Jong Un has been briefed on plans to carry out an attack against the United States territory in the Pacific, Guam by the military of the hermit kingdom, Pyongyang said early Tuesday.

Kim "examined the plan for a long time" and "discussed it" with commanding officers on Monday during his inspection of the command of the Strategic Force in charge of the North's missile units, according to the Korean Central News Agency (KCNA).

The Supreme Leader reportedly said that the US should make the "right choice" to prevent a conflict. Kim also ordered his top generals to prepare the military for a strike on the occasion he deems one necessary.

Tensions soared between North Korea and the United States last week after President Donald Trump made repeated bellicose statements to Kim Jong Un, including the promise of "fire and fury" if Pyongyang continued to threaten America with nuclear weapons.

U.S. Secretary of Defense James Mattis and the Secretary of State Rex Tillerson credited UN for anti-nuclearization efforts and said the United States was willing to negotiate with North Korea but said Pyongyang should indicate a desire to show good faith by halting weapons and nuclear tests.

General Joseph Dunford, who is Chairman of the US Joint Chiefs of Staff and the top officer in the military, met Monday with South Korea's defense minister, Song Young-Moo, and defense chief, General Lee Sun-Jin.

"He stressed that North Korea's ballistic missile and nuclear weapons programs threaten the entire global community and endanger peace and stability in the region," Navy Captain Darryn James said.

And he "conveyed America's readiness to use the full range of military capabilities to defend our allies and the US homeland."