The ISIL "committed a massacre in the Mzeiraa area near the town of Salmiya, killing seven people, including two aged 13 and 15 years old," Syrian state news agency SANA said.
The agency added that four other people had been injured.
The pro-opposition Syrian Observatory for Human Rights, a Britain-based monitoring group, also reported the deaths, saying some of them had been shot dead and others killed with knives.
The ISIL militants had also fired on homes in the area with artillery, the Observatory added.
RA/SHI