Egypt: Violence erupts after Morsi TV appearance
7 December 2012 Last updated at 06:54 GMT
President Obama has called the Egyptian President Mohamed Morsi to express his "deep concern" about the deaths of protesters in Egypt.
He called for dialogue without preconditions between the two sides.
In Cairo, protesters set fire to headquarters of the Egyptian Muslim Brotherhood after President Morsi appeared on state television attempting to justify his decision to use force against demonstrators.
John McManus reports.