The leak and distribution of classified UK-U.S. trade documents online is tied to a previous Russian disinformation campaign, social media site Reddit said on Friday, fuelling fears that Moscow is seeking to interfere in Britain’s upcoming election. Britain’s opposition Labour Party seized on the leaked documents on Nov. 27, saying they showed the ruling Conservatives were plotting to offer the state-run National Health Service (NHS) for sale in trade talks with Washington. The NHS is much loved by Britons and has become an important issue in the country’s election campaign, in which Labour trails the Conservatives despite cutting its lead in some polls. But researchers told Reuters on Monday that the way the documents were first shared on Reddit and then promoted online closely resembled a disinformation campaign uncovered earlier this year. That operation — known as Secondary Infektion — attempted to spread false narratives across at least 30 online platforms, and stemmed from a network of social media accounts which Facebook said “originated in Russia.”“We were recently made aware of a post on Reddit that included leaked documents from the UK,” Reddit said in a statement. “We investigated this account and the accounts connected to it, and today we believe this was part of a campaign that has been reported as originating from Russia.” The company said it had identified and suspended 61 accounts which attempted to further promote the leaked papers.“All of these accounts have the same shared pattern as the original Secondary Infektion group detected, causing us to believe that this was indeed tied to the original group,” it said. A Labour spokesman declined to comment on how the party obtained the leaked documents or ties to the Russian campaign.