State security prosecutors ordered on Sunday to 15 days detention pending investigations for Ahmed Tharwat, the son-in-law of Muslim Brotherhood Deputy Supreme Guide Khairat El-Shater.
Tharwat, who himself is a member of the Brotherhood, is being held pending investigations. He faces several accusations including, “joining a terrorist organisation, formed in violation to the provisions of the constitution and law”, state-run MENA reported.
The Brotherhood’s activities were banned by court in September, 2013 and the group was designated a terrorist organisation by the government in December, 2013.
Tharwat reportedly remained silent during interrogations.
He was arrested Saturday upon his arrival from Qatar following orders by the prosecution to arrest him and put his name on watch lists, according to state television.
However, acting Muslim Brotherhood spokeswoman Wafaa Al-Banna said he had been missing for the three days preceding his arrest.
Since the 3 July 2013 ousting of former president Mohamed Morsi, authorities have cracked down on the Brotherhood. The interim authorities designated the group as a terrorist organisation on 25 December 2013. All top leaders have been arrested or are on the run.
El-Shater, the Brotherhood’s second-in-command, was arrested on 5 July, two days after Morsi’s ouster.
He is charged in several cases, including forming an operations room to spread chaos in Egypt.
El-Shater’s son was also arrested by interim authorities on 28 August. He is facing charges of funding a terrorist organisation and inciting violence.