The owner of a TV station on trial for incitement following his call for the killing of Egypt's Islamist president has been released after being briefly detained over allegations of theft of electrical power and bounced checks, security officials said on Monday.

They said Tawfiq Okasha was released late Sunday after nearly 10 hours of questioning at a police station in Cairo's Nasr City district.

Authorities last month closed Okasha's TV station — Al-Faraeen," or "The Pharaohs" — which he used to launch scathing attacks on President Mohammed Morsi and the leader's Islamist group, the Muslim Brotherhood.

News of Okasha's detention broke on the same day Justice Ministry officials said an investigating judge referred the last prime minister of Egypt's deposed authoritarian leader Hosni Mubarak to trial on corruption charges arising from the decade he served as civil aviation minister. Besides Ahmed Shafiq, the chairman of national carrier EgyptAir and nine other ministry officials were also referred to trial.

The EgyptAir chief, Tawfiq Mohammed Asi, had just been named to his post on Thursday, and a party with hundreds of employees had been given at the company's headquarters to celebrate the appointment. A career pilot, he was the chairman of the national carrier between 2007 and 2009, when he was fired by Shafiq.

Shafiq left Egypt shortly after his narrow defeat by Morsi in a presidential runoff in June. He has already been referred to trial on separate corruption charges dating back to the 1990s when he chaired a housing association for air force officers. Mubarak's two sons, onetime heir apparent Gamal and wealthy businessman Alaa, were charged in the same case together with four retired generals.

Shafiq lives in the United Arab Emirates.