Egypt's President Mohammed Mursi has condemned the violence outside Cairo's main cathedral last night in which a man was killed and more than 80 people were injured.

The violence came as mourners left St Mark's Cathedral, the headquarters of the Coptic Pope, following the funerals of four Coptic Christians killed in sectarian violence on Thursday.

Mourners had earlier chanted slogans against President Mursi - who has ordered a police investigation into the violence.

Egypt's Coptic Church issued a statement last night calling for calm and expressing sorrow for the clashes.

President Mursi has promised to protect the rights of Coptic Christians, who makeup about 10% of Egypt's 84 million people.