MOSCOW Russian Deputy Foreign Minister Sergey Ryabkov said Tuesday that while Moscow and Washington may hold talks on bilateral relations before the end of autumn, a trilateral summit including Ukraine is unlikely. Speaking in an interview with the Russian state news agency Tass, Ryabkov said Russian Foreign Minister Sergey Lavrov and US Secretary of State Marco Rubio may meet on the sidelines of the 80th session of the UN General Assembly in New York City, which opened on Sept. 9. The