Saad El-Katatni, head of the Brotherhood’s Freedom and Justice Party (FJP) and former speaker of parliament, was arrested along with Rashad al-Bayoumi, one of the Brotherhood’s deputy leaders, in a crackdown on the movement that began hours after the army ousted elected president Mursi.

The men were being held in Torah prison on the outskirts of Cairo, where Mubarak and his sons Alaa and Gamal are jailed.

Mubarak is on trial on charges of complicity in the killing of protesters in the 2011 uprising that ousted him. His sons face separate corruption charges.