An Egyptian doctor at a field hospital says at least 16 supporters of ousted President Mohammed Morsi have been killed near a Cairo demonstration following clashes with security forces.
Yehia Mikkia says the Friday night clashes have overwhelmed the hospital operating from the sit-in where the protesters have been camped for over three weeks. He said early on Saturday that at least 16 people were killed.
Police fired tear gas to disperse hundreds of Morsi supporters near the sit-in, setting off clashes that lasted for hours- in a possible sign of a new intolerance for marches that block city streets.
The clashes erupted following a day when millions took to the streets answering a call from the army chief, who said he wanted a mandate to stop "potential terrorism" by Morsi supporters.
The largest crowds in two and a half years of upheaval filled Egypt's streets on Friday, while ousted President Morsi was formally placed under investigation on a host of allegations including murder and conspiracy with the Palestinian militant group Hamas.
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Morsi's supporters also showed no signs of backing down, though they turned out in vastly smaller numbers.
In the city of Alexandria, seven people were killed and over 100 were injured in clashes between supporters and opponents of Morsi, officials said.
