British Foreign Secretary Boris Johnson has welcomed the release of UK-based financier William Browder after a brief detention by police in Spain.
Johnson tweeted on Wednesday 30th May: "Just spoken to Bill Browder— very glad that he has now been released."
As reported by AP, Browder was detained by Spanish police on a Russian warrant, which authorities later said had expired.
Browder was a driving force behind the Magnitsky Act, which lets US authorities impose sanctions on Russian officials over human right abuses. The act is named after Browder's former employee Sergei Magnitsky.
He also led one of the biggest investment funds in Russia for 10 years before he left the country and was barred from entry in 2006 as a threat to national security.