The Al Jazeera news agency reports that its live Egypt coverage has been taken off air. A statement on its website said:
Al Jazeera's live Egypt service have been taken off air along with several other TV channels.
Reports from our correspondents say this happened during a live broadcast when security forces stormed the building and arrested the presenter, guests and producers.
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.