A senior soldier in the U.S. Army has been arrested in the U.K. on suspicion of spying for Russia, London's Metropolitan Police said on Tuesday evening.
The unnamed 41-year-old man was arrested near Gloucester, a city in western England, on Tuesday as part of an investigation by the U.K.'s Counter Terrorism Policing. British police worked with U.S. authorities, including the military and the FBI, in their investigations.
A senior NATO military official confirmed on Tuesday that the American service member was assigned to the military alliance's Allied Rapid Reaction Corps (ARRC).
ARRC, headquartered in the English county of Gloucestershire, is a 3-star NATO headquarters with more than 400 permanent staff from more than 20 nations ready to deploy land forces where they are needed.
The individual at the center of the case, detained in London, is suspected of committing offenses under Sections 1 and 3 of the U.K.'s National Security Act.