A Syrian army helicopter dropped two barrel bombs on a displaced persons camp in the northern province of Idlib, camp residents said on Wednesday, and video footage appeared to show charred and dismembered bodies.
Footage posted on YouTube showed corpses of women, children and burning tents while people scrambled to save the wounded. "It's a massacre of refugees," a voice off camera said.
"Let the whole world see this, they are displaced people. Look at them, they are civilians, displaced civilians. They fled the bombardment," the man's voice said.
A man in another video of the Abedin camp, which houses people who had escaped fighting in neighboring Hama province, said as many as 75 people had died.
Syrian state media did not mention the bombing. The British-based Syrian Observatory for Human Rights, which tracks violence in the civil war, said 10 civilians died.
Reuters could not independently confirm the attack. Barrel bombs are crudely made containers filled with nails, metal shrapnel and explosive that are dropped from helicopters.
Rights groups say they have been dropped by the army on densely populated neighborhoods in defiance of a U.N. Security Council resolution banning the indiscriminate explosives.
Nearly 10 million people have been displaced by Syria's civil war, which started with pro-democracy protests but grew into an armed revolt when security forces cracked down on the demonstrations. More than 3 million refugees have fled the country and the conflict has killed close to 200,000 people, according to the United Nations.
Both the Syrian government and insurgent groups are accused by rights groups of killing civilians and destroying homes.