The Syrian Observatory for Human Rights said it had documented the executions of 67 civilians, including children, and 150 members of regime forces by IS terrorists in different parts of Homs province since May 16, AFP reported.
"The Observatory has confirmed that the Islamic State [IS] has executed 67 civilians, including 14 children and 12 women in Sukhnah, Al-Amiriyah, the outskirts of the Officers' Housing and Palmyra," said the Britain-based group, referring to several areas in the east of Homs province.
"IS [ISIL] also executed more than 150 members of the army, National Defence Forces and Popular Committees (pro-regime militias) and others accused of being 'informers loyal to the regime'," the Observatory added.
Observatory director Rami Abdel Rahman said whole families had been executed, including children along with their parents.
"Most of the deaths were in Palmyra, some of the executions were shootings, others were killed with knives and beheaded," he told AFP.
Syrian state media said IS had carried out a "massacre" in Palmyra, slaughtering some 400 civilians, mostly women and children.