RAWALPINDI An accountability court here on Tuesday, once again, issued arrest warrants for six accused foreign directors in the Cotecna reference filed by the National Accountability Bureau (NAB). AC Judge Najamul Hassan Najam reissued the arrest warrants and adjourned the hearing till April 2. The court, however, exempted former chairman Central Board of Revenue (CBR) A.R. Siddiqui from appearing before the court in the next hearing. It also asked for details regarding the health of the co-accused Nusrat Bhutto. Siddiquis counsel was presented in court on behalf of his client, and submitted an application stating Siddiquis illness. In the Cotecna reference, the former prime minister Benazir Bhutto and her husband President Asif Ali Zardari have been accused of grabbing six percent of the total revenue of the pre-shipment for awarding a contract to Cotecna. The reference alleges that they had received $11.8 million in kickbacks for the $131 million contract to supervise Pakistans customs service. The commission was paid to an offshore company allegedly owned by Zardari. Nusrat Bhutto and A.R. Siddiqui remain the co-accused in the case while Benazir Bhuttos name was struck off after her assassination on December 27, 2007. Meanwhile, another accountability court here held a hearing for the Polo Ground reference and adjourned the hearing till March 24. It is expected that the accused - former Chief Commissioner Islamabad Saeed Mehdi - will be charged during the next hearing.