London’s Metropolitan Police said a 41-year-old US Army member was arrested on suspicion of offenses under the National Security Act. The force said the arrest formed part of a counter-terrorism policing investigation relating to Russia. Police described an ongoing investigation; an arrest does not establish guilt, and no court finding is reported.

Sources: Metropolitan Police: news.met.police.uk source ↗ ; Associated Press: apnews.com source ↗