The doctor who tried to save an Iranian protester as she bled to death on a street in Tehran has told the BBC of her final moments.

Dr Arash Hejazi, who is studying at a university in the south of England, said he ran to Neda Agha-Soltan's aid after seeing she had been shot in the chest.

Despite his attempts to stop the bleeding she died in less than a minute, he said.

Dr Hejazi said he had not slept for three nights following the incident, but he wanted to speak out so that her death was not in vain.

He doubted that he would be able to return to Iran after talking openly about Ms Soltan's killing.

"Suddenly everything turned crazy. The police threw teargas and the motorcycles started rushing towards the crowd. We ran to an intersection and people were just standing. They didn't know what to do.

"We heard a gunshot. Neda was standing one metre away from me. I turned back and I saw blood gushing out of Neda's chest.

"She was in a shocked situation, just looking at her chest.