islamabad gunmen motorcycle shoot dead senior pakistani police officer well wife son grandson wednesday family drive baluchistan province officials say two attackers open fire vehicle carry district superintendent muhammad ilyas relatives quetta capital southwestern region police say four-year-old granddaughter survive take hospital add authorities say surge attack security officials baluchistan five suicide bomb one arm attack target police past six months group immediately claim responsibility wednesday shoot though sunni militants sectarian group link al qaeda islamic state well taliban operate region border afghanistan iran separatists also fight long insurgency demand great share region gas mineral resources end say discrimination baluchistan center 57 billion china pakistan economic corridor cpec plan transport energy link western china pakistan southern deep-water port gwadar gunmen shoot dead police officer family southwest pakistan