A bomb blast killed at least six people in a Cairo tourist neighborhood Thursday when police raided a suspected militant hideout.
Three policemen and at least one civilian were among the dead.
Security officials suspect Muslim Brotherhood militants planted the bomb that exploded when police burst into an apartment.
The incident took place in a Cairo neighborhood near the iconic pyramids that houses several tourist hotels.
The Muslim Brotherhood is the party of former President Mohammed Morsi, who was toppled in a 2013 military coup led by Abdel Fattah el-Sisi, the then-army chief who is now Egypt's president.
Also Thursday, the interior ministry said gunmen killed five policemen late Wednesday at a checkpoint in El-Arish, the largest city in the Sinai Peninsula.
No one has claimed responsibility for the attack, but a group affiliated with the Islamic State has been behind much of the anti-government violence in the Sinai since Morsi's ouster.
The latest attacks come days before Monday's fifth anniversary of the popular uprising that brought down Morsi's predecessor, former President Hosni Mubarak.