The bombers were moved after suspicious activity near the base led to a counter-terrorism investigation.

The United States has withdrawn all B-1 bombers from RAF Fairford in Britain following a security incident that triggered a counter-terrorism investigation, the Pentagon confirmed Sunday. Police were called to the airbase in southwest England on September 27 after a local farmer reported several vans and a group of men behaving in a “suspicious” manner.

British Prime Minister Andy Burnham’s official spokesman has insisted that the RAF Fairford airbase was safe. Read more at straitstimes.com.

Donald Trump has said there were "some threats" that led the United States to pull bombers from a UK base.

Washington confirmed earlier that the bombers had left the RAF Fairford airbase -- used by the United States to launch strikes on Tehran -- even as the British government insisted the site was safe.

The United States removed its B-1 bombers from a UK air base one week after several men were arrested there on suspicion of preparing terrorist acts, a Pentagon official said.