Five people were killed and 40 others injured Friday in scattered clashes involving supporters of ousted President Mohammed Morsi, Egyptian security sources told Efe.
All but one of the deaths took place in Cairo, where Morsi's Islamist partisans faced off with security forces and civilian backers of the current military-controlled regime.
Another person was killed in the northeastern city of Suez, while disturbances were also reported in Alexandria.
The army prevented Islamists from staging demonstrations in Cairo's Tahrir Square and deployed additional troops at other key sites in the capital, including the presidential palace.
The National Coalition for the Defense of Legitimacy, which includes the now-outlawed Muslim Brotherhood, is calling on Egyptians to take to the streets through Oct. 6, the 40th anniversary of the start of the 1973 Arab-Israeli War.
The Brotherhood's political arm, the Freedom and Justice Party, dominated the first legislative elections after the 2011 uprising that deposed dictator Hosni Mubarak, and party leader Morsi went on to win the presidential election in 2012.
Egypt's army ousted Morsi in early July amid nationwide protests against his administration. Since then, security forces have killed around 900 of the deposed president's supporters. EFE