Alaa and Gamal Mubarak, the sons of former president Hosni Mubarak, are currently being questioned in Tora Prison by investigation judge Osama El-Seidy, regarding complaints made by MP of the dissolved parliament Wasat Party Essam Sultan against Ahmed Shafiq.
Shafiq was a Mubarak-era aviation minister and presidential candidate in elections this year.
Mubarak's sons are facing charges of wasting public money and seizure of state funds at low prices in violation of the law, as well as of collusion with Shafiq in obtaining vast tracts of land owned by the Association of Pilot Officers.
El-Seidi received the Illicit Gain and Administrative Control Authority reports Tuesday, regarding the complaints Sultan filed.
Sultan accused Shafiq last May of exploiting his position as head of Young Air Force Officers Association by selling thousands of acres of state land in Ismailiya, earmarked for the Association, at reduced prices to Mubarak's sons. Sultan's move came as a part of a campaign to try to keep Mubarak's last prime minister from running for the presidency.
Shafiq refuted Sultan's claims and opened fire on the Wasat Party figure, saying he used to be an informant for the now-defunct state security.
Shafiq said last week that he is to remain in Abu Dhabi for 'security reasons.' He travelled to Saudi Arabia for the Umrah religious pilgrimage on 26 June and was expected to return to Egypt within days, according to a press release issued by his presidential campaign team. He has yet to return to Egypt.