Karachi: Anti Terrorism Court (ATC) Karachi has ordered to present the witnesses on next hearing in May 12 tragedy case. May 12 tragedy case came up for hearing before ATC Karachi Tuesday. During the hearing of the case MQM leaders Wasim Akhtar, Umair Siddiqui and other accused persons appeared in the court. Prosecution told the court case against the accused was registered in airport police station in 2007. The court approved exemption from attendance plea for one day in respect of the accused Zakir. The court while ordering to present the witnesses on next hearing adjourned the hearing of the case till May 17.