British investigators have entered the London offices of the data research firm Cambridge Analytica, which is at the center of controversy over the alleged use of millions of people's personal data from the Facebook social network.

About 20 investigators arrived at the firm's central London offices late Friday, soon after a judge granted a search warrant that Britain's Information Commissioners Office had requested.

Information Commissioner Elizabeth Denham is investigating claims the research firm illegally acquired the personal data from Facebook.

The research firm is alleged to have illegally used the data of an estimated 50 million Facebook users to build profiles for U.S. political campaigns, including the presidential campaign of Donald Trump.

英国调查人员进入了数据研究公司剑桥分析(Cambridge Analytica)的伦敦办公处。这家公司处在社交网络脸书(Facebook)几千万用户个人数据据称被滥用的争议核心。

大约20名调查人员星期五晚间抵达该公司位于伦敦中部的办公处。在这之前不久，法官批准了英国信息专员办公室的搜查申请。

信息专员伊丽莎白·德纳姆正在调查这家研究公司非法从脸书获取个人数据的指称。

据称，剑桥分析非法使用了据估计多达5千万脸书用户的资料，为包括川普总统竞选阵营在内的美国政治竞选团队建立档案。