BBC News with Marion Marshall

The Egyptian police have fired tear gas at demonstrators in the capital Cairo as public anger mounted over football violence. The demonstrators have accused the police of failing to assure security at a football match in Port Said on Wednesday. Seventy-four fans were killed when supporters of the home team clashed with those of a Cairo team. Rupert Wingfield-Hayes, in the Egyptian capital, says many people suspect the violence was stirred up by supporters of ex-President Mubarak.