A device being presented as evidence at a trial in Pakistani blew up after the judge asked a police officer to show how it worked. At least two people were injured, including the policeman, in the blast at an anti-terrorism court in Karachi. The device presented in court was at the request of the defense. When Judge Shakil Haider asked how it worked, a part of the device was pulled and it exploded, throwing the judge off his chair. “We are investigating as to how the detonator was brought to the court without being defused,” said senior police official Jamil Ahmed.