Five people were injured on Thursday in a bomb blast close to a bus in the Egyptian capital, Cairo, the health ministry has said.
The bomb was planted on a pedestrian walkway and exploded as the 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.
A security source has revealed that explosive experts defused a second bomb that was planted in an advertising board close to where the first explosion went off in Nasr City.
On Tuesday, a suicide car bomber targeted a police headquarters in the Nile Delta city of Mansoura, killing 15 people.
