WASHINGTON: U.S. President Donald Trump has abruptly fired John Bolton, his national security adviser following disagreements over handling foreign policy challenges such as North Korea, Afghanistan, Iran, and Russia.

Trump tweeted saying that he had informed John Bolton that his services are no longer needed at the White House saying that he disagreed strongly with many of Bolton’s suggestions.

The US president said he would name a replacement next week.

Bolton, a leading foreign policy expert, and Trump’s third national security adviser had earlier pressed President Trump not to let up pressure on North Korea.

Bolton had also argued against Trump’s suggestions of a possible meeting with the Iranian leadership. (Agencies)