Militants stage a bomb attack near a traffic post in the Egyptian capital, Cairo, wounding four policemen.
Monday's blast targeted a traffic post close to a courthouse in the city's busy Heliopolis district. A colonel and major are among the wounded officers.
Health ministry spokesman Hossam Abdel Ghaffar told AFP that two of the wounded policemen were in serious condition.
The Cairo-based Ajnad Misr (Soldiers of Egypt) militant group claimed the attack in its Twitter account.
The militants have already targeted police and staged bomb attacks outside key buildings in Cairo, including the presidential palace and Cairo University.
In June, the group killed Egypt's top state prosecutor, Hisham Barakat, in a car bomb attack.
The group's leader, Hammam Mohamed Attiyah, who was killed in a gunfight in Cairo in April, had been linked to Ansar Beit al-Maqdis, the Egyptian branch of Daesh Takfiri terrorist group.
Attiyah broke away from Daesh in 2013 and founded the Ajnad Misr group operating mainly in Cairo.
Ansar Beit al-Maqdis, for its part, changed its name to "The Sinai Province" after it pledged allegiance to the Daesh in November and is now spearheading the insurgency in the Sinai Peninsula.
The Sinai Province militants have actively carried out numerous attacks on security forces and judiciary officials since the ouster of democratically-elected president Mohamed Morsi in 2013.
Most of the group's attacks have been focused on targets in the restive Sinai Peninsula; however, deadly bombings have also been staged by the Sinai Takfiris in Cairo and some other Egyptian cities.