At least four people have been killed in the latest unrest in the Egyptian capital Cairo, amid continuing anger over 74 deaths after a football match in Port Said.
Many Egyptians blame authorities for failing to protect fans on Wednesday after a pitch invasion when Cairo's visiting al-Ahly side were attacked after losing to the local al-Masry side.
A demonstrator and a soldier died on Friday as clashes continued outside the interior ministry, with police firing tear gas at stone-throwing crowds, the BBC reports.
A building opposite the ministry was set on fire, state television reported.
There have also been further clashes in Suez, where two people were killed on Thursday.
Most of the dead are believed to be al-Ahly supporters. Hardcore fans - known as "ultras" - have accused the authorities of allowing the killings to happen.
They say the authorities wanted revenge because the ultras were among those battling police during last year's revolution that ousted president Hosni Mubarak.