BRUSSELS (AP) — The European Union has reached out to Moscow in a tentative bid to open a line of communication so the continent is not sidelined in any potential talks to end Russia’s grinding war in Ukraine, officials said Thursday.The news emerged as Ukraine launched one of its biggest drone attacks since Russia’s all-out invasion of its neighbor more than four years ago, Russian officials said Thursday. A major Moscow oil refinery was hit for a second time in a week and commercial flights at Moscow airports were disrupted.Against the backdrop of conflict, the EU has been quietly seeking to reopen communications with Moscow even as it doubles down on its support for Kyiv. Russian President Vladimir Putin, meanwhile, has tried to cut out Europe and Kyiv and negotiate Ukraine’s future with Washington.“⁠In the past few weeks, brief contacts were made at diplomatic level to open communication channels but nothing was discussed on substance,” an EU official with knowledge of the approach said on condition of anonymity to discuss the sensitive move. A second official, also speaking on condition of anonymity because they were not authorized to speak to the media on the matter, confirmed the Russia outreach is taking place but declined to comment further.