Militants say they killed officer
An Islamic militant group in Egypt has claimed responsibility for a bombing that killed a senior police officer.
It said the attack was in retaliation for the killings and arrests by government forces of supporters of the country's ousted Islamist president.
The statement by Ajnad Misr, or "Egypt's Soldiers", a group which first appeared in January, was posted on its Facebook page.
It carried photographs of the slain officer, Brigadier General Ahmed Zaki, a commander in the riot police, showing him riding in a blue pick-up truck.
The group claimed Zaki used a truck with no police insignia as a "disguise" for fear of being targeted.
Attacks against Egyptian forces have escalated since the military last summer removed Islamist president Mohammed Morsi.