Morsi protesters continue sit-in

Supporters of ousted Egyptian President Mohammed Morsi are continuing their sit-in protests despite reports that authorities are preparing for a crackdown.

Egypt's foreign minister has said that the sit-ins could not continue "endlessly".

An interior ministry source said an operation would begin just before dawn.

But there was no sign of police activity at the camps outside the Rabaa al-Adawiya mosque in eastern Cairo and at Nahda Square, to the west.

The BBC's Azza Moheiddin reports from Cairo.