Dozens of people were killed earlier this week in a suspected US-led coalition air raid that hit a school sheltering displaced people near Raqqa, ISIL's self-declared capital in Syria, according to a monitoring group.
The UK-based Syrian Observatory for Human Rights said on Wednesday that its contacts had counted at least 33 bodies at the site near the village of al-Mansoura, west of Raqqa.
The group, which monitors Syria's war via a network of contacts on the ground, said it believed the air raid at the school-turned-shelter had been carried out by the US-led coalition fighting ISIL, which stands for Islamic State of Iraq and the Levant, and is also known as ISIS.
The air raid early on Tuesday morning was also reported by the activist-run Raqqa is Being Slaughtered Silently group, which said dozens of civilians were dead or still missing after the air raid.