Fifteen civilians were killed as a roadside bomb struck a mini-bus they were riding in Helmand province in southern Afghanistan, spokesman for provincial administration Daud Ahmadi said Saturday. "A mini-bus was heading to Khanshin district Friday afternoon when it triggered a landmine, leaving 15 commuters dead and four others injured," Ahmadi told media. He accused Taliban militants of planting the mine in a bid to destabilize the province. (Xinhua)