Within seconds, he was cowering on the ground surrounded by more than a dozen young men, who began beating him with wooden sticks and metal rods. Blood flowed from his head, spattering his clothes. The blows intensified. He thought he would die.
Zubair provided his version of events at a relative's home in another part of the capital, his head wrapped in bandages.
The mid-afternoon attack on Monday, captured in a dramatic Reuters photograph, came against a backdrop of tension and violence.