At least three people were injured in clashes between supporters and opponents of deposed president Mohamed Morsi late on Sunday, Al-Ahram Arabic news website reported.

The clashes erupted in the Nile Delta's Gharbiya governorate shortly before midnight during the funeral of a young man shot dead on Saturday's third anniversary of the 2011 uprising.

Both sides fought, using petrol bombs, bricks and bladed weapons, after Morsi supporters shouted pro-Morsi and anti-army/police slogans, infuriating civilian opponents.

Gunfire was also reported during the clashes, eyewitnesses said.

On Saturday, pro-Morsi protesters clashed with police and pro-government civilians leaving 49 people dead, the health ministry said.

The country has become deeply polarised since the army's ouster of Egypt's freely elected president Mohamed Morsi in July amid massive protests against his turbulent rule.

On Friday, a string of bomb attacks targeting police in Cairo and the neighbouring Giza governorate killed six people and injured dozens.

The recent spate of violence has raised fears that Egypt could see the re-emergence of an Islamist insurgency that raged in the 1990s.