Suspected separatists threw a grenade at a roadside store selling Pakistani national flags in southwestern Baluchistan province on Thursday night, killing a man and wounding 14 people, police said. No one immediately claimed responsibility for the attack in Quetta, the provincial capital. A senior police officer, Fida Hussain, said the wounded were taken to a nearby hospital. Wasim Baig, a spokesman for the provincial health department, said one of the wounded was in critical condition. For nearly two decades, Baluchistan has been the scene of a low-level insurgency by separatist groups demand…