BBC News with David Austin Security officials in Kenya say government troops are continuing to search for suspected Islamist gunmen who carried out a deadly attack on the up-market Westgate shopping mall in the capital Nairobi. _______________________________________ And officials say the group has been pinned down in one part of the complex. This man was in his office in the shopping center when the attack started. 戴维`奥斯丁为你播报BBC新闻. 肯尼亚安全官员称政府军仍在搜寻在首都内罗毕高端商场韦斯特盖特购物中心实施自杀式袭击的伊斯兰武装嫌犯._______________________官方称该组织在大楼的部分区域已被制服.袭击发生时这名男子正在商场办公室.