Crowds are beginning to gather in Tahrir Square to protest against President Mursi's new powers. State television showed a number of protests outside mosques across the city.
Supporters of the president have been staging counter protests, but there are no reports of clashes.
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Four men who violently broke into a home and threatened the family inside are being hunted by police.
According to media, the incident in southern France took place after a police officer was shot and wounded.
Theresa May has called for a "new dynamic" full of “energy and ambition” in the next stage of negotiations