The Obama administration said it was "encouraged" by proposals from Egypt's interim government to restore a democratically elected civilian leadership. White House press secretary Jay Carney said:
It is in our national interest, the best interests of the United States and the best interests, in our view, of our goal of assisting the Egyptian people in their transition to democracy to take the time necessary to evaluate the situation before making such a determination.
We are cautiously encouraged by the announcement by the interim government that it has a potential plan for moving forward with a democratic process and elections, both parliamentary and presidential, and we think that's a good thing.
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.