Egyptians officials say a bomb exploded Thursday near the convoy of the country's interior minister in Cairo, wounding at least seven people.
Security officials say the explosion took place close to the home of Interior Minister Mohamed Ibrahim, who was not hurt in the blast.
State media described the attack as a failed assassination attempt. Initial reports suggested the attackers used a car bomb, but state television later reported that a bomb was thrown from a nearby building.
There is no word on who is responsible.
The attack occurred in the Nasr City neighborhood of northeast Cairo, where security forces last month stormed an Islamist-led sit-in, killing hundreds of supporters of ousted President Mohamed Morsi.
The military, which ousted the Islamist leader following days of protests, has accused Mr. Morsi's Muslim Brotherhood of inciting violence and committing terrorism.
The Brotherhood denies this, saying it is committed to peaceful protests against what it consider a military coup against Egypt's first elected leader.