The supporters of the deposed president said they would continue with their protests.
Thousands of supporters of deposed President Mohamed Morsi have taken the streets again to protest the killing of more than 638 demonstrators on Wednesday.
Protesters defied a state of emergency that has been in force since the killings, amid fears of further bloodshed with the police authorized to use live ammunition in self-defense.
The army deployed dozens of armored vehicles on major roads in Cairo, and medical sources said four protesters died in clashes in the northeastern city of Ismailia, with one dead reported in the Mediterranean port of Damietta.
Violence was also reported in Egypt’s second city Alexandria and in the Nile Delta city of Tanta. Scuffles broke out in Cairo and a police conscript was killed in a drive-by shooting in the north of the capital, state news agency MENA reported.
But sources within the Muslim Brotherhood, which has been behind the protests, said 25 people have been killed already, the BBC reported.
State TV in Cairo says there have been 12 deaths to the north and east of Cairo.
One reporter said he saw a seventh body brought to mosque near Ramses Square. The bodies are being wrapped in green prayer mats then taken upstairs to be wrapped in white shrouds.
European Union diplomats will meet in Brussels on Monday to discuss their response to the bloody crackdown in Egypt. The emergency meeting is a chance for all 28 member countries to outline their position on the situation. Some EU states have already suggested that European aid to Egypt should be frozen.