Security forces arrested the Muslim Brotherhood’s spokesman, Ahmed Aref, early on Thursday. 

A security source said that Aref was arrested at his father-in-law’s residence in Nasr City in Cairo while the Brotherhood’s Freedom and Justice Party confirmed the news on its official page.

The authorities have also arrested the group's supreme guide, Mohamed Badie, and other leading Brotherhood members since they began their crackdown on supporters of ousted President Mohamed Mursi last Wednesday.