[1][2] Initial reports indicated the building housing Pakistan's Criminal Investigation Department (CID) had been badly damaged and a blast crater of 5 metres was discovered in close proximity.
[3] However, the involvement of Lashkar-e-Jhangvi was also contested with interior minister Rehman Malik appearing sure of the possibility.
[4] The attack was coordinated on the headquarters of (CID), which is responsible for anti-terrorism operations, in what is described as the city's "highest security zone" – metres away from the house of the provincial Chief Minister of Sindh and two five-star hotels.
Authorities reported that five to six people were seen throwing grenades and firing at the gate of the building, consequently killing the guards posted there; moments later, a vehicle packed with explosives made its way inside and exploded just metres away from the building, causing damage and destruction to nearby structures as well.
Additionally, other witnesses reported that prior to the blast, a gunfight had taken place between heavily armed militants and security forces; a local resident remarked that this firing continued for 20 minutes before the explosion had occurred.