The spiritual leader of the Muslim Brotherhood, Mohamed Badie, has been arrested in Cairo.
He was reportedly detained at a residential flat in Nasr City in the northeast of the capital.
Badie was charged in July with inciting violence along with other Brotherhood officials. Together with his two deputies he is due to stand trial on August
His detention comes days after his 38-year-old son was shot dead during protests in the capital.
Along with Badie, Egypt’s prosecution is said to have ordered the arrest of some 260 Mursi supporters for forming an illegal organisation.
Since the toppling of Islamist President Mohamed Mursi, hundreds of members of the Muslim Brotherhood have been picked up by police.