he Syrian government says it will send a delegation to fresh peace talks due to start in Geneva on Monday, but has put limits on the agenda.
Foreign Minister Walid Muallem, speaking in Damascus, ruled out any debate of presidential elections.
An opposition spokesman said the government's pre-conditions could halt the talks before they had even started.
US Secretary of State John Kerry is expected to meet his German, French, and British counterparts on Sunday.
Earlier, the US said violence had fallen dramatically since a cessation of hostilities began two weeks ago.
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