MOSCOW - U.S. Secretary of State Rex Tillerson has arrived in Moscow to meet with Russian officials about the Syria civil war.
It's the first official trip to Russia by a member of President Donald Trump's Cabinet.
Russia has been incensed by U.S. allegations of complicity in Syrian President Bashar Assad's use of chemical weapons. The U.S. increased the pressure Monday when a senior official said the U.S. has made a preliminary conclusion that Russia knew in advance of Syria's chemical weapons attack last week.
The visit also comes amid an FBI investigation into whether Russia potentially colluded with Trump's campaign to influence the U.S. election.
Tillerson plans to meet Wednesday with Russian Foreign Minister Sergey Lavrov. It's unclear whether he will also meet with Russian President Vladimir Putin.