Explosion Aftermath (Photo: Ahram)
A bomb exploded outside Misr Gedida Courthouse in eastern Cairo on Monday, wounding two police officers and a civilian, Al-Ahram Arabic news website reported.
Militant group Ajnad Misr (Soldiers of Egypt) claimed responsibility for the attack in a statement posted on its Twitter account.
The Cairo-based group has claimed previous deadly attacks targeting police locations, including bomb blasts outside a presidential palace and outside Cairo University campus.
The interior ministry said those wounded in Monday's blast included a police colonel and a major.
The bomb damaged a power box near the office next to which it exploded.
Explosives experts also defused a second device they found while searching the vicinity of the building after the blast.
This is not the first time a bombing has targeted the court complex; in March, a bomb shattered the building's façade and damaged its doors, but left no casualties.
Islamist militants have carried out scores of deadly attacks, most directed at security forces, since the 2013 ouster of Islamist president Mohamed Morsi.
The attacks have killed hundreds of policemen and soldiers, mostly in the border Sinai Peninsula, but also in other parts of the country.
In July, a car bomb exploded outside the Italian consulate in central Cairo and killed a civilian, the first such attack directed at a foreign mission since the militant campaign began two years ago.
An Islamic State affiliate in Egypt, which has claimed the deadliest attacks in the country, has more recently urged followers to attack judges.
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