The Intelligence Agencies had informed the Punjab Government about the entrance of a explosive-laden vehicle in the city some days ago. The provincial government has also been informed that suicide bombers could hit the vehicle to any key building. The Home Department of Punjab had directed the concerned departments but the administration of Punjab and Law Enforcement Agencies did not do any important home work work for the search of the vehicle. According to sources, the provincial government has been clearly told that the suicide bombers could attack on any building to get their associates free. Sources further told that at the time of the blast, investigation was underway from arrested persons belonging to more than 12 banned outfits. These people were arrested from two to three months. Sources said that the FIA was receiving threats while investigation agencies have obtained key leads about the attack in this regard.