Five bombs exploded outside police stations in Egypt's second city of Alexandria on Tuesday, wounding 10 civilians, police said.

Militants regularly set off explosives in Cairo and Alexandria, but the deadliest attacks have been in the Sinai Peninsula where troops are fighting an Islamist insurgency.

Clashes between protesters and security forces left at least 14 people dead on Sunday, the anniversary of Egypt's 2011 revolt that toppled strongman Hosni Mubarak.

Authorities had tightened security in Cairo and other cities after Islamists called for protests against the government of President Abdel Fattah al-Sisi, the former army chief who ousted his Islamist predecessor Mohamed Morsi in 2013.

Gunmen killed a policeman and wounded three others in a drive-by attack on a patrol in Egypt's second city Alexandria on Sunday, a security official told Agence France Presse.

"Armed men aboard a minibus opened fire on them and then made off," the official said.

An Egyptian appeals court in Alexandria on Sunday reduced a two-year jail sentence for award-winning activist Mahienour el-Massry for holding an illegal protest to six months, her lawyer said.

After the army ousted Islamist president Mohammed Morsi last July, the authorities launched a harsh crackdown on both Islamists and the secular opposition.

An Egypt court on Monday sentenced 33 supporters of ousted president Mohamed Morsi to six-year jail terms each for committing acts of violence during an unauthorized protest, judicial sources said.

The accused, deemed by the court to be members of Morsi's Muslim Brotherhood, were found guilty of violent acts during clashes between Islamist demonstrators and opponents of Morsi in the Mediterranean city of Alexandria last December, the sources said.

A court in the Egyptian city of Alexandria is to hear an appeal on December 7 from 14 Islamist women protesters sentenced to 11 years in jail, their lawyer said Saturday.

Ayman Dali told AFP that an appeal by seven other girls, all under the age of 18 and part of the same case, will also be heard that day by a separate court for juveniles.

Fifteen women and seven girls who back Egypt's ousted president Mohammed Morsi will stand trial for participating in clashes in Alexandria, the general prosecutor's office said on Monday.

The girls, all under the age of 18, will be prosecuted in a juvenile court, a statement said.

Hundreds of angry supporters of ousted president Mohammed Morsi marched through Egypt's second city of Alexandria on Wednesday rioting and armed with wooden clubs, an Agence France Presse reporter said.

Chanting "Morsi is my president", the protesters set fire to car tires and tore down pictures of army chief Abdel Fattah al-Sisi, who was behind the Islamist leader's July 3 overthrow.

Thousands of supporters of Egypt's ousted Islamist president Mohammed Morsi Thursday celebrated Eid al-Fitr, the end of the Muslim holy month of Ramadan, defying government calls for them to leave the streets.

However there was no immediate sign that the government was readying to carry out its threat made Wednesday to remove Islamist protest camps set up to demand Morsi's reinstatement following his ouster by the army on July 3.

A long-running sit-in in Cairo by supporters of ousted president Mohammed Morsi will be ended "in the framework of the law," Egypt's Interior Minister Mohammed Ibrahim said early Saturday.

In a telephone interview with satellite television station Al-Hayat, he was asked about the sit-in at Cairo's Rabaa al-Adawiya square.