At least one was killed when an improvised bomb exploded Friday near a metro station in Giza, state TV reported, in the second explosion in Greater Cairo on Friday.
TV footage showed a police cordon around Behous metro station in Giza’s Dokki district.
At least 15 others were reportedly wounded in the attack.
Earlier on Friday, a major blast hit a Cairo police headquarters, killing at least four and injuring 51 others
Bomb attacks have become commonplace since the ouster of president Mohamed Morsi in July, but until Friday deadly attacks have largely taken place outside the capital.