U.S. and Russian participants have met in Switzerland for unofficial talks about the Ukraine war in recent months, including as recently as last week, three sources with knowledge of the matter said.
While the attendees have diplomatic and security experience, they are not government officials and it was not immediately clear if any were sent by their governments, two of the sources said. The sources declined to identify the attendees. The sources described the talks as a side channel with some contacts occurring during the transition period following U.S. President Donald Trump's Nov. 5 election victory.
At least a small number of advisers to Trump are aware of the encounters, said one of the sources, who had direct knowledge of the matter.
Many other details remain unclear, including whether Ukrainians were present, when the encounters began and what the meetings' agendas covered.