Egyptians are bracing themselves for more violence on the Muslim day of prayer - 2 days after a military coup backed by a popular uprising removed its President.
The Muslim Brotherhood is refusing to accept its deposed president's fate.
Mohamed Morsi is believed to be under house arrest along with other members of his movement.
Round-up continues
As the country's top judge, Adli Mansour, was sworn in as interim president on Thursday, at least 4 senior figures of the Muslim Brotherhood were arrested.
Mr Morsi's supporters are digging in for sit-in protests in parts of Cairo, manning barricades, brandishing shields and clubs.
They have been surrounded by concentric rings of armour by the military, but there are still fears of violent clashes after Friday prayers.
A few miles away, celebrations continued for a second night in Tahrir Square.
Those who support the regime change deny this is a military coup. Instead they insist they have sacked a leader who had abused his office to take Egypt in an undemocratic direction.
Euphoria
It seems like the same euphoria that followed the first revolution, and in some ways that is the point.
After 2 and a half difficult years, Egyptians are desperate to relive the heady days that came after the fall of Hosni Mubarak.
Mansour was sworn in as interim President yesterday:
