There have been deadly clashes in Egypt as both supporters and opponents of President Mohammed Morsi staged mass demonstrations across the country.
Tension has risen ahead of a protest planned by the opposition on Sunday, calling on Mr Morsi to step down.
In Cairo, thousands of Morsi supporters rallied outside the main mosque.
At least two people, one said by state TV to be a US journalist, were killed in the city of Alexandria as protesters stormed a Muslim Brotherhood office.
There are conflicting reports about how the young American, who was reported to be taking photos of clashes, died on Friday.
Egyptian officials say he was stabbed in the chest, but other reports say he was hit by gun pellets.