BBC today.
As fighting raged, Damascus demanded written guarantees from the rebels to end attacks and a promise from foreign governments not to fund or arm them.

As many as 160 people were killed on Saturday, many of them said to be civilian victims of shelling by government forces, and fierce new fighting was reported on Sunday (today).

Damascus issued its two new demands just 48 hours before the deadline for the Syrian army to withdraw from towns and cities.

In doing so, it has thrown the entire ceasefire deal into doubt, the BBC's Grant Ferrett reports.