A bomb exploded outside a restaurant in the residential district of Imbaba, killing one and wounding two, the Interior Ministry said in a statement.
Television footage on Thursday showed the facade of a small restaurant damaged, and shrapnel along a street.
There was no claim of responsibility for the attacks.
Bomb blasts have become a common occurrence in Egypt, while the government accuses opponents from the Muslim Brotherhood – the movement of ousted President Mohamed Morsi – of standing behind these explosions.
The Brotherhood says, however, that it is committed to peaceful opposition.