BBC news with Marion Marshall. Boko Haram militants have captured a key military base in the far northeast of Nigeria which was used by a multinational force set up to fight the insurgents. They've also seized the town of Baga. ________________________________________________________. "This is a significant town in the northeast on the shores of lake Chad. And according to the senator, it was the last town that was still being held by the government forces. So it's quite a significant move by Boko Haram. And of course for the people of had to flee, they are now in a very, very precarious situation. Some of them went cross the lake towards Chad. Others just run into the bush and some we've spoken made to the safety of Maiduguri city." 这里是BBC新闻,马里德.马歇尔为您报道. 博科哈马武装分子已经占领了尼日利亚东北部边远地区的一个重要军事基地,多国军队曾在这里驻扎以打击叛乱分子.同时他们也占领了巴格镇._______________________________.拉各斯,威尔.罗斯为您报道. "这是东北部在查德湖岸边的一个战略城镇.根据参议员的说法,这是政府军守住的最后一个镇.因此这次对于博科哈马组织来说也是一次关键的行动.那些不得不背井离乡的人们,现在一定处在非常危险的境地.他们有的穿过了湖跑向乍德.有的甚至就跑进草丛,有的我们采访过的人们跑到了安全的迈杜古里市。”