Anti-terrorism Court on Wednesday released the alleged mastermind of Lahore GPO chowk blast.A suicide bomber had blown himself up in 2008 near GPO Chowk killing 10 police officials. Police had arrested the mastermind of the attack, Shahzad Ahmed, and had registered a case against him as per Terrorist Act. The trial continued for four years in the Lahore anti-terrorism court. After the completion of all arguments by the lawyers of the parties, the court released the accused on the basis of insufficient evidences.