State media: Two blasts rock bridge in Cairo

Two blasts rocked a bridge in Cairo on Friday, state media reported.

The cause of the blasts was unclear.

Instability has raged in Egypt since the military toppled democratically-elected Mohamed Morsy last year. Security forces have also cracked down on the Islamist movement that supported him, the Muslim Brotherhood.

Last month, a powerful explosion hit the police headquarters in Cairo. It struck a key symbol of authority in a country shaken by political turmoil and violent unrest in recent years.