President Trump lashed out at North Korea on Tuesday in response to a report of a new milestone in its nuclear quest, vowing the rogue regime risks “fire and fury like the world has never seen.”

His harsh comments to reporters came hours after The Washington Post, citing a confidential Defense Intelligence Agency report, said North Korea has produced a miniaturized nuclear warhead that can fit inside its missiles.

The DIA completed the analysis in July, shortly after another intelligence assessment that sharply raises the official estimate for the total number of bombs in the communist country’s atomic arsenal, the Post said. 

The technological breakthrough is considered a crucial advancement on the path to producing a nuclear weapon capable of striking the U.S. mainland, experts said.