A doctor who treated the older brother of the Syrian boy pictured in Aleppo after an airstrike struck his home, has given an interview in which he says the brother has died of his wounds.

Ali Daqneesh, 10, was wounded in the strike on his home last Wednesday, as were his three siblings and both parents.

A surgeon who gave his name only as Dr. Abdelrasool said Ali suffered severe damage to his right kidney and that his lung had collapsed.

A general view shows the site of last Wednesday's airstrike where five-year-old Omran Daqneesh was injured in the rebel-held al-Qaterji neighbourhood of Aleppo. The Daqneesh family lived in the building on the left. (Abdalrhman Ismail/Reuters)

"He stayed in the intensive care unit for three days," he said. "His general condition was unwell because he stayed behind in the rubble for a long time," unlike his brother, five-year-old Omran.

The younger boy was pictured in the back of an ambulance after being pulled from the rubble, with an expression of incomprehension on his dust- and blood-caked face.

Aleppo neighbourhood targeted by airstrikes 1:03

The video and pictures were widely circulated online and in the media, refocusing public opinion on Syria's five-year-old civil war and the plight of civilians, particularly in Aleppo.