He was based at Imjin Barracks. That's NATO's Allied Rapid Reaction Corps headquarters.
That's everything we know.
Why this mattersSo this is a NATO command's own officer, accused of spying for the alliance's biggest adversary. From inside the headquarters built to stop exactly that.
The ARRC isn't a quiet desk job. It's NATO's rapid-response land command — the headquarters that would run any fast military reaction to a crisis in Europe. A field grade officer there would normally see operational planning. Exactly what Russia would want most.
London's Metropolitan Police say he was arrested under sections 1 and 3 of the National Security Act. Obtaining or disclosing protected information. Assisting a foreign intelligence service. Police say the allegations relate to Russia.
He's still in custody at a London police station. Officers are searching two locations in Gloucestershire. His name hasn't been released.
FBI Director Kash Patel called it an important arrest involving allegations of espionage of the utmost concern to the US and its allies. He said quote "this FBI has no tolerance for anyone who breaks their oath to the United States".
Gen. Sean Stinchon runs US Army Counterintelligence Command. He said the alleged conduct of a senior soldier, entrusted with sensitive information, is a sobering reminder that insider threats are real and persistent. He said the case shows the strength of the partnership between US and British investigators.
Deputy Assistant Commissioner Vicki Evans of UK Counter Terrorism Policing called it a significant arrest. She said the investigation is ongoing.
And this isn't the only security scare at a British base used by the US lately. Two months ago, five men were arrested around RAF Fairford, a base the US used to bomb Iran. The US then pulled its B-1B bombers out. Two UK nationals have since been charged under the National Security Act over that one, accused of assisting Iran. The day before this arrest, the US moved refuelling and special operations aircraft out of RAF Mildenhall over a reported Iranian threat.
But police say this arrest isn't linked to any other ongoing Counter Terrorism Policing investigation. So the Russia case and the Iran-linked incidents at Fairford and Mildenhall are being treated as separate threats. Arriving in the same narrow window. At bases tied to the same alliance.
The head of MI5, Sir Ken McCallum, said a month ago that Russia was escalating its hybrid warfare. He called it the UK's top threat.
So what did this officer actually pass on? Nobody's said. How long it went on for, whether he acted alone — still unknown. His name is expected once formal charges are filed.
Right now, a NATO command headquarters has one of its own officers sitting in a London police cell. Accused of working for Russia.
