Russia and the United States began talks in Saudi Arabia on Monday to discuss a possible truce in Ukraine, where Russia has been waging a war for more than three years, Russia's state-run TASS news agency reported, citing a source familiar with the negotiations.

The source said that the Russian delegation, which included Senator and former diplomat Grigory Karasin and Federal Security Service member Sergei Beseda, met with the US delegation in Riyadh.