At least six people were killed when a police vehicle was bombed in southwest Pakistan Wednesday.
Officials say the vehicle was driving down the Saryab Road on the outskirts of Quetta, the capital of Baluchistan province, when a car loaded with explosives detonated.At least four of those killed were policemen. More than 20 others were injured in the blast.
An investigation is underway to determine if a suicide bomber was responsible, or if the explosives-filled car was detonated remotely when the police truck was passing by.
The oil-rich Baluchistan province is plagued by a low-level separatist insurgency and an Islamic militant forces.Reuters news agency says the Pakistani Taliban has claimed responsibility for Wednesday's attack.