Clashes erupted on Saturday between Egyptian police and protesters outside a Cairo police station following the death of a young man who was in custody, local media report.
The young man nicknamed Afroto had been detained following his arrest on Friday for alleged drug trafficking.
He is reported to have died after a violent brawl with other detainees.
The protesters however accused the police of being responsible for Afroto’s death.
They blocked roads by setting up tyre fires, prompting the fire brigade to intervene.
According to the reports, nine people were injured and 20 people arrested in the overnight scuffle in Cairo’s working class neighbourhood of Moqattam.
Calm returned to Moqattam later in the morning after Cairo’s security chief pledged a probe into the detainee’s death, promising not to obscure any police involvement.
The prosecutor examined the body and ordered an autopsy.
Egypt has tried and sentenced several policemen for violent deaths in detention in recent years.
