The number of injuries in confrontations since Tuesday's protest against President Mohamed Mursi's decree has reached 315, announced spokesman of Egypt's Ministry of Health on Thursday.

All but 51 of the injured have been dismissed from the local hospitals where they were admitted, the spokesman said, adding that injuries varied from scratches to superficial wounds while one protester died of a heart attack on Tuesday.

The police-civilian violence escalated on Friday following demonstrations held against President Mohamed Mursi's constitutional decree announced on Thursday.

The decree, which expanded the president's powers, was met with outrage from his opposition and wide support from his supporters.

Liberal, leftist and socialist forces staged nationwide demonstrations on Tuesday to express their outrage against a decree issued by Mursi.

Supporters of the Muslim Brotherhood and Mursi also held demonstrations outside of Cairo to show support for the decree on Tuesday where clashes erupted in several governorates.