According to analysts, North Korea has shown off what is thought to be a new intercontinental ballistic missile during an early morning military parade.
Before dawn, the event took place in the secretive country and was later broadcast there and in South Korea.
Edited footage from the parade, which was used to mark the 75th anniversary of the country's ruling party, shows a 22-wheeled transporter carrying the seemingly-new weaponry - thought to be larger than anything previously displayed by the state.
Also on display was the Hwasong-15, the longest-rang missile the country has ever tested, and what is thought to be a new submarine-launched ballistic missile.
Speaking at the event, Kim Jong Un told North Koreans he would pre-emptively mobilize his strongest military power if threatened. He added that he was not aiming for any country in particular.
He said North Korea would continue to build "self-defensive deterrence" and apologized for living standards in the country, as well as the coronavirus pandemic.
"I am ashamed that I have never been able to repay you properly for your enormous trust," he said. "My efforts and devotion were not sufficient to bring our people out of difficult livelihoods."