Egypt's army has been holding talks with government and protest leaders, as the deadline it set for a resolution to the mass protests approaches.
President Morsi has rejected an ultimatum to "meet the demands of the people" or face military intervention.
He says he is Egypt's legitimate leader and will not be forced to resign.
The army says it will issue a statement after the 16:30 (14:30 GMT) deadline expires, and now has control of the state TV building.
Clashes broke out at rival protests across the country overnight, with at least 16 pro-Morsi protesters killed at a demonstration at Cairo University.
His opponents say he and the Muslim Brotherhood party from which he comes are pushing an Islamist agenda onto Egypt, and that he should stand down.
The Brotherhood has said the army's action amounts to a coup.
In a defiant televised speech on Tuesday evening, Mr Morsi said he would give his life to defend constitutional legitimacy, an
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