Sergei Kislyak, Russia's ambassador to Washington and a key figure in ongoing U.S. investigations into Moscow's meddling in the 2016 presidential election, ended his tenure Saturday.
The Russian Embassy in Washington said on its Twitter feed that Minister-Counseler and Deputy Chief of Mission Denis Gonchar would serve as charge d'affaires until Kislyak's successor arrives.
Kislyak, who has held the post since 2008, is expected to be replaced by Deputy Foreign Minister Anatoly Antonov.