(CNN) -- An armed group that operates in Gaza has claimed responsibility for last week's car bombing in Cairo that apparently targeted Egypt's interior minister.
In a statement posted online Sunday, the Mujahedeen's Shura Council of Aknaf Bayt al-Maqdis said it carried out the attack in response to the interim government's "massacre" of Muslim Brotherhood supporters.
Egyptian Interior Minister Mohammed Ibrahim was not hurt in the attack.
The bomb targeted the minister's motorcade Thursday in eastern Cairo, near Ibrahim's residence.
Egyptian state news agency EgyNews said four security personnel were injured, with one police officer having a leg amputated as a result of his injuries.
Cairo has witnessed wide unrest on its streets since former President Mohamed Morsy was ousted in July and an interim administration was installed by the military.
A crackdown last month by Egyptian authorities on Morsy supporters left hundreds of people dead.