Russia, USA, Turkey, Saudi Arabia to talk Syria on Thursday in Vienna: reports

MOSCOW (Reuters) - The foreign ministers of Russia, Saudi Arabia, the United States and Turkey plan to meet on Thursday in Vienna to discuss ways to resolve the Syrian crisis, a Russian Foreign Ministry source was quoted as saying by Interfax news agency. "On Friday, the number of negotiators could be widened," the source added. (Reporting by Katya Golubkova; Editing by Christian Lowe)