Syrian rebels have lost control of a string of southwest towns, many of which have made their own peace with the regime's forces after heavy air strikes.
A string of Syrian rebel-held towns and villages have accepted government rule as insurgent lines collapsed in parts of the southwest under an intense bombardment.
The southwest was an early hotbed of the uprising against President Bashar al-Assad and defeat there would leave rebels with just one remaining stronghold -- the area around Idlib province bordering Turkey in the northwest.
Rebels met Russian negotiators on Saturday to seek peace terms for Deraa province, where most of their southwest territory is located, but said these failed. Moscow is Assad's strongest ally and its air power since 2015 has been crucial to his recapture of vast swathes of Syria.
