It's Charles Carroll with the BBC news. The French Prime Minister Manuel Valls says that some of those linked to the attacks last week in Paris which killed 129 people used the migration crisis in Europe to enter France unnoticed. He was speaking on French state television. "These individuals took advantage of the refugee crisis of the chaos, perhaps, for some of them to slip into France. Others were in Belgium already, and others I must remind you were in France." Mr. Valls warned that passport free travel in the EU was threatened unless external border controls were improved. ________________________________________________ 查尔斯`卡罗尔,BBC新闻 法国总理曼努埃尔`瓦尔斯说,上周造成 129 人死亡的巴黎恐袭案嫌疑人,利用欧洲难民危机趁机进入法国.瓦尔斯在法国国家电视台发表讲话."这些人中,一些或许是趁难民危机之乱潜入法国,而另一些则身在比利时,甚至还有一些仍在法国".瓦尔斯警告说,若不加强边境管控,欧盟免签制度将受威胁._______________________________________________________