They said the terrorists dug into the Tulul al Safa heights, east of Sweida province, had begun their retreat in the last few days as Syrian army tanks backed by heavy air strikes approached their last hideout, Reuters reported.
Syrian state media, quoting army sources, said they had closed in on Tulul al Safa and reports said the army had finally raised the national flag near the tomb of a revered holy figure close to the site.
Daesh rampaged through Sweida city in July from the desert areas east of the city, killing more than 200 people and detonating suicide vests.
The militants are believed to have fled to other areas to the west, including the towns of al Hasa and al Rahba, with many also melting into the vast sparsely populated eastern desert region, reports said.