independently confirm the attack.

One video shows a man arriving at the scene on a motorbike.

He runs into the camp and screams at others to pick up the bodies, trying to convince them that the people on the ground with limbs missing might still survive if taken to hospital.

"This one's good! This one's good!" he shouts, telling two men to carry a limp body to a nearby pick-up truck.

"Pick him up from the stomach not the leg," he screams.

US 'horrified' by reports of attack

The United States said it was "horrified" by the reports, calling the attack "barbaric."

"We are horrified by the reports that the Assad regime barrel bombed the Abedin displaced persons camp in Idlib and the images we saw of the carnage against innocent civilians," state department spokeswomanJen Psaki said.

"The attack on the Abedin camp was nothing short of barbaric."

Ms Psaki said the US could not confirm details of the incident, but said if the bombings proved to have been carried out by Mr Assad's forces, "it is only the latest act of brutality by the regime against its own people."

Barrel bombs are crudely-made containers filled with nails, metal shrapnel and explosives.

Rights groups say they have been dropped by the army on densely populated neighbourhoods in defiance of a UN 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