Russian airstrikes against insurgents in southwest Syria resumed on Wednesday, residents and a war monitor said, after a rebel said talks to restore government rule there peacefully had failed.

The airstrikes targeted the towns of Tafas, northwest of the provincial capital Deraa, and Saida, to its east, said the Syrian Observatory for Human Rights.

Syrian President Bashar Assad is waging a campaign in the southwest with Russian air support to recapture the region from rebel groups, and has seized a large chunk of their territory.