Diplomats forge new track to end Syria violence but no truce

New ideas are being proposed and more talks are being prepared but there is no quick resolution in sight for Syria's agony.

A U.S.-hosted meeting of major world and regional powers made only piecemeal headway on creating a multilateral track for ending the beleaguered country's grinding war.

U.S. Secretary of State John Kerry convened top diplomats from Russia and regional powers like Saudi Arabia, Turkey and Iran on Saturday for a 4 1/2-hour meeting in Switzerland. The talks came amid heightened urgency about the war's latest flashpoint, the city of Aleppo.

The fighting has killed a half-million people, sparked a refugee crisis and offered a territorial base to the radical Islamic State group.

Kerry's new approach comes after last month's U.S.-Russian bid to end the war collapsed in days.