Three people were killed and 28 wounded on Friday in Egypt as Islamist protesters clashed with security forces and civilian opponents, the health ministry said in a statement.
Meanwhile a security official told AFP 17 policemen were wounded in the capital Cairo, and that protesters torched three police cars.
Supporters of deposed president Mohamed Morsi have been near-daily protests to demand the reinstatement of the Islamist leader since he was toppled by the military in July.
The interior ministry said 60 Morsi supporters were also arrested nationwide Friday
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Friday's violence erupted in Cairo and in other parts of Egypt, including second city Alexandria and in the Sinai city of Al-Arish where police fired tear gas at Islamist protesters, state media said.
In Cairo three people were killed and 23 others wounded in the fighting, the health ministry said.
Two people were wounded in Fayoum, southwest of the capital, two others in the Nile Delta province of Sharqiya and one in the Mediterranean city of Alexandria.
A security crackdown on Morsi supporters since his overthrow has left more than 1,400 killed, and thousands others in jail.
Egypt's military-installed authorities listed the Muslim Brotherhood movement, from which Morsi hails, as a terrorist group following a suicide bombing that killed 15 people in a police station in December.
The group condemned the bombing and has denied involvement in any of the violence rocking Egypt since Morsi's ouster.