Syrian leader Bashar al-Assad must leave office or face being turfed out by force, Saudi Foreign Minister Adel Al-Jubeir said, warning of stepped up support for Syrian rebel groups. Jubeir rejected Russian calls for an international coalition to help Assad fight the Islamic State group, and said the Syrian leader’s best option would be to step down. “There is no future for Assad in Syria, with all due respect to the Russians or anyone else,” Jubeir told reporters in New York on Thursday after meetings with Saudi Arabia’s allies.