At least four people were reportedly killed and dozens injured in a blast targeting security forces' vehicle in Quetta, provincial capital of Balochistan, on Saturday, Dawn reported.
Provincial home secretary Akbar Durrani said six people were also injured in the blast.
"We can not ascertain right now whether it was an Improvised Explosive Device or a suicide attack," said Akbar Durrani.
Television footage showed several wounded Frontier Corps personnel being shifted from the scene.
