Extremist groups in the Syrian opposition are responsible for the mass killing of civilians, executions and hostage-taking in the countryside of northwestern Syria, says Human Rights Watch.
The rights group says an investigation into a military offensive by the rebels found strong evidence of war crimes and crimes against humanity.
During the offensive, which began in rural Latakia on August 4 and lasted for two weeks, it said at least 190 civilians had been killed and more than 200 hostages taken.
The rights group said in its report issued yesterday that at least 67 of the victims were executed or unlawfully killed in the attack on pro-government villages.
"These abuses were not the actions of rogue fighters," said the acting Middle East director at Human Rights Watch, Joe Stork. "This operation was a co-ordinated, planned attack on the civilian population in these Alawite villages."