One person was killed and four others were injured by a bomb blast close to a bus here today.
The bomb planted on a pavement exploded as the public bus passed by in the northern district of Nasr City, a security source said.
It comes a day after the government declared the Muslim Brotherhood a terrorist organisation.
Bombings in Cairo have so far not been a feature of the ongoing confrontation between security forces and ousted president Mohammed Morsi's supporters in the Muslim Brotherhood.
The explosion came one day after Egypt's government designated the Brotherhood a terrorist organisation, and two days after a bombing at a police headquarter in northern Egypt killed at least 15 people.
