Talks in the Swiss city of Lausanne on Saturday on the crisis in Syria have ended with no apparent breakthrough, a report said.

The meeting only included regional powers, alongside Russian Foreign Minister Sergey Lavrov, US Secretary of State John Kerry and UN special envoy for Syria Staffan de Mistura, reported CNN.

Kerry said the parties reached a consensus on a "broad agreement" on a number of important points, specifically a "desired outcome on ending conflict," in his remarks to the press.

Saudi Arabia, Qatar, Turkey, Iran, Egypt, Iraq and Jordan were among the regional powers represented, according to a statement by the US State Department.

International outcry has mounted over the plight of some quarter of a million civilians trapped in the Syrian city of Aleppo as the Syrian military, backed by Russian warplanes, pounds its streets into rubble, even as Kerry emphasised the delivery of humanitarian aid.

The talks were only the latest in a long series that have done little to alleviate the suffering of those caught up in Syria's civil war of five and a half years.