Opposition activists say the brother of a wounded Syrian boy who gained international attention has died.

The Britain-based Syrian Observatory for Human Rights said Sunday that Ali Daqneesh, 10, died the day before from wounds sustained in the same airstrike on a rebel-held neighborhood in Aleppo.

Syrian activists released haunting footage showing Omran Daqneesh, 5, rescued from a partially destroyed building in the aftermath of the airstrike late Wednesday in the northern city, which has seen heavy fighting in recent weeks. Omran was treated and later discharged.

The Halab Today opposition TV station posted a photo of Ali, 10, in a hospital with a tube coming out of his mouth, saying he later died from his wounds.