A Cairo prosecuter's office has ordered the detention of one suspect for 15 days pending investigation of his alleged involvement in the attack on Constitution Party spokesman Khaled Dawoud on Saturday.
The 20-year-old man has been accused of attempted murder and possession of bladed weapons.
In a statement on its official Facebook page, the ministry said that police forces arrived on the scene of the incident on Qasr El-Aini Street in downtown Cairo. Upon speaking to eyewitnesses, they were able to arrest a 20-year-old man alleged to be involved in the incident.
“He had banners designed for Muslim Brotherhood marches,” the interior ministry statement said.
A report was filed and the general prosecution notified to begin investigations.
Dawoud’s Constitution Party also blamed Muslim Brotherhood supporters for the attack.
In an official statement following the incident, the party said: “The Muslim Brotherhood has rewarded his defence of their future by stabbing him.”
Dawoud was driving on Qasr El-Aini Street as an anti-government Muslim Brotherhood march was underway. He told Al-Ahram Arabic news website that that his car was attacked, protesters pulling him out of the vehicle, beating him and stabbing him with a knife.
No official charges have been brought yet and it is not confirmed whether the person arrested is a member of the Muslim Brotherhood.
Meanwhile, the Freedom and Justice Party (FJP), the Brotherhood's political wing, condemned the attack in a short statement on its official Facebook page. It said that it is "against all acts of violence, even if they against those who supported [president Mohamed Morsi's ouster]."
The Muslim Brotherhood has been staging nationwide demonstrations against the interim government since the army deposed Mohamed Morsi 3 July amid mass popular protests against his rule.