Washington, Dhu-AlHijjah 13, 1438, September 04, 2017, SPA -- Any threat to the US or its allies will be met with "massive" retaliation, US Defence Secretary James Mattis warned, after North Korea claimed to have tested a hydrogen bomb. Pyongyang said earlier Sunday it had tested a hydrogen bomb that can be loaded onto an intercontinental ballistic missile (ICBM), shocking its regional neighbours - particularly South Korea and Japan - and provoking worldwide condemnation. The test at 12:30 pm (0330 GMT) was a "perfect success," according to North Korean state media. If confirmed, it would be the most powerful device ever tested by North Korea, and mark a significant step forward in the secretive regime's nuclear capability. US President Donald Trump was briefed on all possible military options against North Korea during a meeting with his national security team, Mattis said. --SPA 03:46 LOCAL TIME 00:46 GMT www.spa.gov.sa/w481103