ISIS has beheaded its own members in public in the district of Khasham in the eastern countryside of Deir Ezzor, the Syrian Observatory for Human Rights (SOHR) reported on Friday.
“The three men were beheaded by sword; two of them beheaded for banditry while the third one for killing a man and throwing him in well in order to steal his money,” the UK-based Observatory said.
At least three air raids were conducted by Syrian regime warplanes on the countryside of Deir Ezzor, the SOHR added. The air strikes attacked ISIS positions in the town of Mo Hasan, causing damages and casualties, activists reported.
Regime warplanes also carried out another air raid around the airbase of Deir Ezzor, while regime helicopters dropped a barrel bomb on an area in the neighbourhood of Al Hweqa.
Meanwhile, US-led coalition warplanes carried out strikes on several areas in the oilfield of Al Omar which is under the control of ISIS.
ISIS seized large areas in Syria and Iraq and declared a self-imposed rule last year, but has come under strain after a series of defeats in Syria, brought about in part by air strikes on its forces and infrastructure.
The group was forced to withdraw from the town of Kobani after four months of fierce fighting with Kurdish forces, who were supported by US air strikes. ISIS has also lost ground to the Syrian government and Kurdish Peshmerga forces elsewhere.
ISIS has been the target of US-led air strikes in both Syria and Iraq since bombing begab on Sept. 23, 2014.