Thousands of supporters of ousted Egyptian President Mohammed Morsi gathered overnight in Cairo, repeating their demands that he be returned to power.
The protests come as the interim president appointed a new prime minister. Economist Hazem el-Biblawi has said he will offer ministerial posts to members of the Muslim Brotherhood in the transitional government, state media reports.
The Muslim Brotherhood tells ITV News they are against violence but will "pay the price of their blood" to restore their ousted president.
Egypt's army has named two further officials in the transitional government as its supporters and opponents vowed to stay on the streets.
There has been outrage in Egypt after 51 people were killed near an barracks where ousted President Mohamed Morsi is thought to be held.