According to reports, Mohammad Salim Ezadyar, the son of Mohammad Alam Ezadyar, initially sustained injuries during the protest and succumbed to it after he was taken to hospital.
He had reportedly wounded after receiving a bullet in his face.
The protest in Kabul turned violent in some parts of the city as hundreds and thousands of people started rally against the deadly Wednesday bombing in the city.
The protest started earlier today as thousands of people are heading towards Zambaq square, located close to the area where a massive vehicle-borne bomb was detonated on Wednesday morning.
The security forces initially resorted to aerial firing in a bid to disperse the angry protesters who are believed to be aiming to move towards the Presidential Palace.
Over 90 people were killed and more than 400 others sustained injuries after a vehicle believed to be a water tanker packed with explosives was detonated near the Embassy of Germany on Wednesday morning.
The Afghan intelligence said the attack was plotted and carried out by the Haqqani terrorist network based in Pakistan.
The Kabul police officials said Thursday that the attack was aimed at the Embassy of Germany.