United States Defence Secretary James Mattis has strongly warned North Korea of "massive military response" if it threatened the U.S. or its allies.
This warning came after North Korea on Sunday announced that it has successfully conducted a test of a hydrogen bomb that is meant to be loaded into an intercontinental ballistic missile.
"Any threat to the United States or its territories including Guam or our allies will be met with a massive military response," The Hill quoted Mattis as saying.
"Kim Jong-Un should take heed the United Nations Security Council's unified voice. All members unanimously agreed on the threat North Korea poses. And they remain unanimous in their commitment to the denuclearization of the Korean peninsula. Because we are not looking to the total annihilation of a country, namely, North Korea," he added.
The United Nation Security Council has announced that it would be having an emergency meeting to discuss the developments.
Earlier, U.S. President Donald Trump on Sunday termed North Korea a "rogue nation" for conducting nuclear tests and said that its "actions continue to be very dangerous to the Washington."
In a series of tweets, Trump further said that North Korea has become a great threat and embarrassment to China.