At least four had been shot dead, he said.
Earlier Dr Mohammed Fatuh, who heads a field hospital in the square, confirmed to AFP that three more bodies had been brought in bearing bullet wounds.
Medics earlier reported four deaths, one from live fire and three from asphyxiation after tear gas was fired.
The deadly unrest comes around a week before the first legislative elections since a popular uprising ousted veteran autocratic leader Hosni Mubarak in February. (*)
Editor: Kunto Wibisono
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