Thousands of protesters are holding rallies across Egypt to demand the reinstatement of ousted President Mohammed Morsi.
The Muslim Brotherhood, from which Morsi hails, is mobilizing followers to march in Cairo and elsewhere Friday for a protest they're dubbing "Breaking the Coup."
Youth activists who launched the massive protests that led to Morsi's ouster by the military also plan a mass demonstration in Cairo's Tahrir Square, raising fears of clashes in the capital between the two sides and authorities.
The military has warned it will act swiftly to prevent violence.
The protests come days after an interim administration was appointed.
Egypt's interim President Adly Mansour has pledged to protect his country against those who seek chaos and violence in the aftermath of the popularly backed military coup