Secretary of State John Kerry warned Tuesday that Washington is considering a "Plan B" to deal with Syria if Damascus and Moscow are not serious about negotiating a political transition, AFP reports.
Briefing US lawmakers, Kerry said he had told Russia's President Vladimir Putin the United States would not wait more than a few months to see whether Moscow's ally Bashar al-Assad is serious about talks.
But he would not be drawn on details of any "Plan B" that he would advise President Barack Obama to adopt if efforts to mediate a political deal to end the Syrian civil war fail.