Analysts said the missile, which was shown on a transporter vehicle with 11 axles, would be one of the largest road-mobile intercontinental ballistic missiles (ICBMs) in the world if it becomes operational.

"This missile is a monster," said Melissa Hanham, deputy director of the Open Nuclear Network.

Also displayed were the Hwasong-15, which is the longest-range missile ever tested by North Korea, and what appeared to be a new submarine-launched ballistic missile (SLBM).

Ahead of the parade, which was held to mark the 75th anniversary of the founding of its ruling Workers' Party, officials in South Korea and the United States said Kim Jong Un could use the event to unveil a new "strategic weapon" as promised earlier this year.