LAHORE The investigators are again in darkness regarding Data Darbar and Gamay Shah blasts as both the accused detained have expired in the police custody, TheNation learnt reliably However, police officials claim that the investigation is underway. The investigation has lost its importance as the two main suspected terrorists have died in the police custody in September, a senior official of Lahore police revealed on condition of anonymity. He said two leading banned outfits Lashkar-e-Jhangvi and Punjabi Taliban had joined hands after GPO Chowk blasts and carried out the two attacks - Datar Darbar and Gamay Shah attacks. According to him, police had apprehended Sheikh Lalbaba M Hussain alias Bilal in connection with GPO Chowk blasts and in the light of preliminary investigation, two other suspected terrorists were arrested from remote areas of Khyber PK. He further added that we traced solid evidences that the bombers, who committed suicide blasts at the GPO Chowk and Naval War College in Lahore, had strong links with the militant groups Lashkar-e-Jhangvi and Punjabi Taliban. Perhaps the arrest of these two forced these groups to join hands but in the meantime, he said, they managed to close the chapters of the lives of those two suspected terrorists in police custody. I cannot inform you anything more but it has been established so far that the main accused have been killed, he added. Some solid evidences were traced with the help of information received from them and we were about to break the terrorists network but now we are clueless, he remarked. He, however, maintained that the Senior Superintendent of Police (Investigation) and head of the Joint Investigation Team (JIT) Zulfiqar Hameed committed a severe and unpardonable negligence during this process. Meanwhile, Zulfiqar Ham-eed told a newsman that nothing was established from the DNA tests of all the three heads of suspected terrorists. He, however, said that same kind of explosive material was used in Data Darbar and Gamay Shah blasts. A senior criminal law expert advocate Supreme Court of Pakistan Aftab Bajwa told TheNation that the investigation was always over whenever the criminals expired in police custody either accidentally or intentionally. The investigation regarding those killed during police custody is automatically stopped but if some other accused involved in the same case is alive, the case can be proceeded against him, he added. The DIG Investigation Shoaib Dastgir and Zulfiqar Hameed did not respond despite the repeated requests by this scribe.