Trump reiterates warning of 'devastating' military option as N. Korea moves jets

United States President Donald Trump has issued a familiar warning to North Korea, saying America is prepared to use "devastating" military action if necessary -- even as Pyongang moved a small number of fighter jets, external fuel tanks and air-to-air missiles to a base on its eastern coast.

Speaking alongside Spanish Prime Minister Mariano Rajoy, Trump reiterated that the U.S. is "totally prepared" if they have to use the military option, saying military action in North Korea would be "devastating."

"If we take that option it will be devastating -- devastating -- for North Korea. It's called the military option," Trump said.

"He's acting very badly. He's saying things that should never ever be said," he said on Kim Jong-un.

Trump said the U.S. was responding to Kim's provocations, but insisted his replies were merely in response to rhetoric from Pyongyang. He also decried the situation there, saying he was left a "mess" by previous administrations.

"I'll fix the mess. We'll see what happens," he added.

On Monday, the North Korean regime had threatened to shoot down U.S. aircraft flying off its coastline even if they are in international airspace.