British media reported on Friday that an incendiary bomb was dropped on a school in the town of Urum al Kubra near Aleppo on Monday.
The Syrian opposition accused President Bashar Assad's forces of dropping phosphorus bombs and napalm on civilians, killing 10 and injuring dozens.
The alleged attack occurred as the United States and its European and Middle Eastern partners honed plans to punish Assad for a major poison gas attack last week on the suburbs of the capital, Damascus, that killed hundreds of civilians.
According to eye-witness reports, a fighter jet flew repeatedly overhead seeking out targets, the BBC reported.
Video footage uploaded on the Internet, apparently of Monday's attack, showed doctors frantically smearing white cream on the reddened skin of several screaming people, many of them young boys.
BBC reporters at the scene described the injured as looking like "the walking dead," saying they have seen no shrapnel injuries and very little blood.
Sky News aired a video showing two men suffering from napalm-like burns.
One of them, reportedly a school teacher, said students were attacked as they tried to escape a nearby attack.
"We tried to get out quickly so we don't get hurt, but it seems someone's fate caught up with them today. A gathering of students formed, which is normal as the students needed to leave under these circumstances, and the plane hit us," he is shown as saying in the video, speaking in Arabic and being translated via voice-over.
Sky News reports the video was posted online from an account associated with a rebel group in Aleppo.
"Assad's military aircraft have hit populated areas with the internationally prohibited phosphorus bombs and napalm," the Syrian opposition coalition said in a statement earlier this week.
It was not possible to independently confirm the report. There have been previous unconfirmed reports of the use of phosphorus bombs by Assad's forces during Syria's conflict, now in its third year.
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