A self-declared police force loyal to the Islamic State of Iraq and Syria decapitated four men in western Syria after accusing them of blasphemy, a rights group monitoring the Syrian conflict said on Saturday.
The men were beheaded in the countryside east of the city of Homs by the militant group's "Islamic Police", the British-based Syrian Observatory for Human Rights said.
The Observatory, which monitors the conflict using sources on the ground, reported a similar killing on Tuesday, when ISIS beheaded a man in a town square in the north of the country.
Residents and activists say ISIS has beheaded and stoned to death many people in areas it controls in Syria and Iraq for actions they see as violating their reading of Islamic law, such as adultery, homosexuality, stealing and blasphemy.