An Egyptian police officer was killed when a bomb targeting a traffic police kiosk exploded in Cairo, security officials said.
The explosion rocked the busy Lebanon Square in Cairo's Mohandessin district on Friday, killing Mohammed Gamal Eddin, Egypt's interior ministry said, Al-Jazeera reported.
A security official told the Associated Press news agency that the bomb was planted inside the traffic post and it exploded around 10pm (08:00 GMT).
A second official also said that unidentified assailants hurled the bomb from a bridge over the traffic post before fleeing.
Three other people were injured in the attack including a senior police officer, the two officials said.
Security forces sealed off the area while searching for more bombs. No group immediately claimed responsibility for the attack.