The U.S. Air Force has removed all of its bombers from a U.K. air base following a security incident that led to the arrest of five British men and one U.K.-Iranian national last month, a Pentagon spokesperson confirmed to CBS News on Sunday.

All U.S. bombers deployed to RAF Fairford have been returned to their home stations in the United States, the spokesperson said. The Wall Street Journal was first to report on the bombers' return.

"U.S. Air Force bombers routinely operate around the world to support global force readiness and operational requirements," the Pentagon spokesperson's statement said. "The Airmen that operate America's bomber force, including B-1s, B-2s, and B-52s, remain ready to deliver precision global strike capabilities – including through operations that launch and recover from the continental United States – anywhere, anytime."