(CAIRO) -- With bodies still being counted from the unprecedented bloodshed earlier this week, at least 80 more people were killed Friday around Egypt as clashes erupted during protests billed as a "Day of Rage." In the capital, thousands of supporters of ousted President Mohamed Morsi hit the streets after Friday prayers to march towards Cairo's Ramses Square.
In a statement sent out to supporters Friday morning, the Muslim Brotherhood called on "the great Egyptian people to gather in all revolutionary squares on the Friday of Rage."
The statement continued, "Afterwards, all marches will meet at the nearest intersection, and will all head to Ramses Square. Meanwhile, million-man marches will be held in all other Egyptian governorates."
In preparation for the marches, Egyptian security forces positioned guards alongside Armored Personnel Carriers (APCs) at Ramses Square.
Violent clashes erupted as the throngs of protesters arrived, live gunfire rang out and military helicopters circled overhead. The nearby makeshift field hospital in downtown Cairo told ABC News workers there had counted at least 80 bodies, but that number may climb.
The mostly unarmed protesters were chanting anti-military slogans and "Execute Sissi," referring to the army chief, Gen. Abdel Fattah El-Sissi, who took control when Morsi was removed from power.
Dramatic videos emerged of protesters fleeing the barrage of gunfire, and some flinging themselves off bridges.
Friday's violence may hint at what's to come. Late Friday night, the Muslim Brotherhood announced a week of daily demonstrations in every square in Cairo and nationwide. The so-called "Week of Departure" kicks off Saturday.
Follow live as the action unfolds.
Wednesday was the single deadliest day in Egypt's modern history. Egypt's health ministry has counted at least 700 bodies, but the Muslim Brotherhood said the death toll was in the thousands.
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