Who could have thought of that a 13-y-o boy was killed and buried by his three classmates in Handan, Hebei province?When the parents knocked on the house door of one of the underaged criminals for seeking his missing son, the door was kept shut for two hours.The body of the tragic boy surnamed Wang was found later in a 2-meter-deep hole of a vegetable greenhouse, with its facial structure heavily destroyed to unrecognition. The aunt of the dead was violently stopped by local police officer and fell on the ground several times when trying to see the body with her own eyes. It's alleged that Wang was being bullied at school for a long time. The three suspects, who are also 13 years old, have been criminally detained on suspicion of intentional killing, according to the local police in Handan, quoted the Beijing News. The case is being jointly investigated by the public security organs of both Feixiang district and Handan city.Besides, Hebei Provincial Public Security Department has dispatched a working team to provide guidance for the investigation of this case.