The White House has warned that the US is ready to use the “full range” of capabilities at its disposal and might resort to using its nuclear arsenal against North Korea if it continues to threaten Washington or its allies.

On Sunday, President Trump again called Japanese Prime Minister Shinzo Abe by telephone to reaffirm Washington's commitments to its allies in the region.

READ MORE: S. Korea holds ballistic missile drill in response to Pyongyang’s nuclear test

“President Trump reaffirmed the commitment of the United States to defending our homeland, territories, and allies using the full range of diplomatic, conventional, and nuclear capabilities at our disposal,” the White House said in a statement.

The White House specifies “nuclear capabilities,” as opposed to merely “military capabilities,” in readout of Trump’s call with Abe. pic.twitter.com/106v9IBiFD — Philip Rucker (@PhilipRucker) September 3, 2017

Both leaders have condemned North Korea’s nuclear test and called Pyongyang's behavior “destabilizing and provocative actions.”

Trump has also “confirmed the two countries' ironclad mutual defense commitments, and pledged to continue close cooperation,” the statement read.

..North Korea is a rogue nation which has become a great threat and embarrassment to China, which is trying to help but with little success. — Donald J. Trump (@realDonaldTrump) September 3, 2017

In a series of tweets Sunday, Trump branded North Korea a “rogue nation and a threat.” The latest development in Pyongyang’s nuclear capabilities are “very hostile and dangerous to the United States,” the US president said.

The United States is considering, in addition to other options, stopping all trade with any country doing business with North Korea. — Donald J. Trump (@realDonaldTrump) September 3, 2017

Following the tweets, Trump held a meeting with his chief of staff, Gen. John Kelly, and Defense Secretary James Mattis at the White House to discuss an appropriate response to the North Korean hydrogen bomb test.

Mattis later warned that any attack on the United States or its allies would be met with a “massive military response.” He noted that while the US was not “looking for the total annihilation” of North Korea, it had “many options to do so.”

Trump says 'we’ll see' when asked whether US would attack North Korea https://t.co/pn78QsvpT3pic.twitter.com/bbmXcCdUrp — RT America (@RT_America) September 3, 2017

“Any threat to the United States or its territories, including Guam or our allies, will be met with a massive military response – a response both effective and overwhelming,” Mattis said.

READ MORE: US not looking for ‘total annihilation’ of N. Korea, but ‘we have many options to do so’ - Mattis

Pyongyang has successfully tested a hydrogen bomb which can be mounted on an Intercontinental Ballistic Missile (ICBM), the country’s state TV announced Sunday.

READ MORE: Putin & Xi agree to ‘appropriately deal’ with N. Korea test, urge all sides 'to show restraint'

Just prior to conducting the six nuclear test, the North announced that it has all the indigenous technology and production capacity to carry out a super powerful Nuclear electromagnetic pulse (EMP) attack, which, if exploded at a high altitude, could paralyze electronic systems infrastructure of any country. The US considers a potential EMP attack a real threat to the nation, capable of inflicting “catastrophic” damage.

READ MORE: N. Korea tested hydrogen bomb that can be mounted on ICBM – state TV

Concerned over North Korean nuclear ambition, South Korean military has conducted a live-fire drill, simulating an attack on the North’s nuclear site. The drills involved the country's Hyunmoo ballistic missile and the F-15K fighter jets.