Most of those killed during Sunday's clashes in Cairo and other governorates where shot by live ammunition, said Hisham Abdel-Hamid, spokesman for the Forensic Medicine Department.
Abdel-Hamid told Ahram Online on Monday that Zeinhom morgue had received 41 bodies, 39 of which died as a result of live rounds, while the other two suffered birdshot wounds.
The official death-toll from Sunday's clashes between supporters of ousted president Mohamed Morsi and security forces has risen to 53, the health ministry announced earlier Monday.
The remaining 12 bodies are yet to be transported to the morgue, according to Abdel-Hamid.
The violence, which lasted until close to midnight, also left 271 injured.
Deadly clashes erupted in Cairo as Morsi supporters marched towards Tahrir Square, where thousands were celebrating the 40th anniversary of the 1973 war against Israel and voicing support for the army.