Opposition activists in Syria say the bodies of dozens of young men have been found by a river in the country's largest city, Aleppo.
Activists believe the victims had been arrested by Syrian government forces and summarily executed, the BBC reports.
At least 65 bodies were found on the banks of the Quwaiq river in the western district of Bustan al-Qasr, the UK-based Syrian Observatory for Human Rights (SOHR) said.
Most had their hands tied behind their backs and gunshot wounds to the head.
A captain in the rebel Free Syrian Army said some of those who had been killed were just teenagers.
He told the AFP news agency that many bodies were still in the water and the death toll might rise to 100.
A Syrian government source said that many of the victims had been kidnapped but accused "terrorists" - the term officials use to describe the rebels - of carrying out the kidnappings and killings.