Islamabad- An accountability court in Islamabad, which was hearing the Rental Power Projects (RPP) case today, summoned all accused in the case, including former prime ministers Raja Pervaiz Ashraf and Yousuf Raza Gilani on April 23, 2014. The accused persons would be indicted in the next hearing of the case adjourned to the said date. Meanwhile, former premier Ashraf and former finance minister Shaukat Tareen appeared in the court. The accountability court was also hearing the Oil, Gas and Power Regulation Authority (OGRA) corruption case during which former Ogra chairman Tauqir Sadiq and another main accused Dewan Zia ur Rehman appeared in the court. Dewan Ziaur Rehman is accused of corruption amounting to Rs 52 billion. Gilani is accused of giving approval to the appointment of Sadiq. Raja Ashraf was head of the selection committee which had approved it in OGRA references. While NAB has been investigating 12 RPPs cases in which nine firms reportedly received more than Rs 22 billion as mobilization advance from the government to commission the projects, but most of them were accused of failing to set up plants. The bureau has already recovered Rs 13 billion in the case.