ISLAMABAD - National Accountability Bureau (NAB) is all set to file yet another corruption reference amounting to $20 million against ex-Prime Minister Raja Pervaiz Ashraf regarding alleged corruption in Pakistan Power Resources Guddu, a rental power project, The Nation has learnt.According to well-placed sources in NAB, the investigations in corruption case of a RPP Guddu have been completed and chairman NAB is likely to approve a corruption reference in this regard in the next executive board meeting. The sources maintained that according to the investigation, Guddu Rental Power Project was sponsored by Pakistan Power Resources in 2006 and it has been noticed that the total rental value in respect of Guddu plant was determined at US $72.48 million against which 14 per cent down payment, equal to US $10.15 million (7 per cent on 17.03.2008 and 7 per cent on 12.03.2009), was made thereof. But, the sources said, when the plant was shifted from Guddu to Naudero, again for the second time 14 per cent advance payment was made on 06.04.2010 to M/S Walters Power International. Sources said that by this way, around $20 million were paid as advance payment by the officials of ministry of water and power headed by the then minister Raja Pervaiz Ashraf. The NAB under the command of Chaudhary Qamar Zaman has filed 40 references since November last year out of which at least 19 are high profile references. Out of the 19 cases, the most high profile case that hit the headlines are the RPPs cases which, besides the then minister Raja Pervaiz Ashraf, also include the then Finance Advisor Shaukat Tareen. Tareen has been accused of releasing 7 per cent mobilisation advance to the RPP companies in February 2009 while the issue was taken to the ECC in April 2009. Three references in RPPs have been filed by NAB so far and all include Raja Pervaiz Ashraf as accused. According to NAB officials, 19 people have been indicted in RPPs references and they include Raja Pervez Ashraf, former federal secretaries Shahid Rafi and Ismail Qureshi, and Tahir Basharat Cheema, former managing director PEPCO.The Pakistan Power Resources Guddu reference will be the fourth reference against the ex-premier.This news was published in The Nation newspaper. Read complete newspaper of 01-Jun-2014 here.