The United States removed all its B-1 bombers from Britain's RAF Fairford air base, a decision stemming from security concerns over suspected terror plots against the facility, The Wall Street Journal reported on Sunday, citing US officials.

Until their departure, about a dozen B-1 bombers had been stationed at the base Northwest of London, a hub for US bomber strikes on Iran, according to the report.

"While operational security precluded us from confirming the movement of our assets and forces in real-time, we can now acknowledge that all US bombers that were deployed to RAF Fairford have redeployed to their home stations in the United States," the Pentagon said in a statement.

The decision follows the arrest of six suspects in connection to a suspected attack on the base that US and British officials said was foiled last Sunday.