Russian Foreign Minister Sergei Lavrov is due to meet US Secretary of State John Kerry and Saudi Minister of Foreign Affairs Adel Jubeir in Vienna on Friday, October 23.
The main topic on the agenda is expected to be the crisis in Syria and the fight against the self-proclaimed Islamic State (IS, formerly ISIS/ISIL).
A coalition led by the United States, and which includes Saudi Arabia, started targeting IS in Syria in September 2014. The Russian Air Force has been carrying out air strikes against IS targets in Syria since September 30, 2015.