Dozens of protesters on Friday hurled stones at security forces stationed behind the cement wall in Sheikh Rihan's Street in downtown Cairo.
The protesters were rallied at the intersection of Sheikh Rihan's Street and al-Qasr al-Aini Street.
Some protesters tried to reason with those hurling stones and tell them that today's demonstrations are peaceful, the Middle East News Agency (MENA) reported.
Clashes erupted on Thursday between demonstrators and security forces in al-Qasr al-Aini Street after some protesters had attempted to remove concrete blocks from the cement wall in the street.
Sixteen people were injured in yesterday's clashes according to a Ministry of Health statement.