ISLAMABAD - An accountability court in Islamabad reserved its ruling over former President Asif Ali Zardari's acquittal in five references against him.On Tuesday, Zardari's counsel Farooq H.Naik concluded his arguments before AC judge, Muhammad Bashir. He said the National Accountability Bureau (NAB) failed to produce any evidence against his client, and no one came as witness against him.NAB reopened cases against Zardari in 2013. The references are:Polo ground case: This reference builds upon the construction of a polo ground along with ancillary works at the Prime Minister House, which NAB says are illegal and in violation of the rights and privileges afforded to him. SGS: This corruption case is the continuance of a reference filed in 1997 that accused the late Benazir Bhutto and her spouse Zardari to have gained off a contract between the SGS and the government.ARY: This reference revolves around granting of trade licenses to ARY Traders for importing gold and silver which NAB says has caused losses to the treasury. Ursus tractors: This reference deals with alleged corruption during the import of Russian and Polish tractors.Cotecna: This case is about the award of a contract to the Swiss company after allegedly receiving six per cent bribe on the revenue proceeds.The court will announce the verdict on May 28.This news was published in The Nation newspaper. Read complete newspaper of 21-May-2014 here.