The US Commerce Department said on Monday it was putting 28 Chinese public security bureaus and companies – including video surveillance company Hikvision – on a US trade blacklist over Beijing’s treatment of Uygur Muslims and other predominantly Muslim ethnic minorities. Those added to the so-called “Entity List” include the Xinjiang Uygur autonomous region People’s Government Public Security Bureau, 19 subordinate government agencies and eight commercial firms, according to a Commerce Department filing. The companies include Zhejiang Dahua Technology, IFLYTEK Co, Xiamen Meiya Pico Information Co and Yixin Science and Technology Co. The department filing said the “entities have been implicated in human rights violations and abuses in the implementation of China’s campaign of repression, mass arbitrary detention, and high-technology surveillance against Uygurs, Kazakhs, and other members of Muslim minority groups”. US officials said the announcement was not tied to this week’s resumption of trade talks with China. Being added to the “Entity List” bars companies or other entities from buying parts and components from US companies without US government approval. Why Washington won’t be buying Huawei’s offer to build a US rival The Commerce Department previously added Huawei Technologies Co and more than 100 affiliates to the Entity List. Hikvision, officially known as Hangzhou Hikvision Digital Technology Co Ltd, with a market value of about $42 billion, calls itself the world’s largest video surveillance gear maker. Reuters reported in August Hikvision receives nearly 30 per cent of its 50 billion yuan (US$7 billion) in revenue from overseas. Hikvision did not immediately comment on the Commerce Department’s move. Does facial recognition tech breach citizens’ civil rights? John Honovich, founder of surveillance video research company IPVM, said Hikvision and Dahua both use Intel, Nvidia, Ambarella, Western Digital and Seagates as suppliers and that the impact on the Chinese companies would be “devastating.” Shares in Ambarella fell more than 9 per cent on the news. In August, the Trump administration released an interim rule banning federal purchases of telecommunications equipment from five Chinese companies, including Huawei and Hikvision. Huawei has repeatedly denied it is controlled by the Chinese government, military or intelligence services and has filed a lawsuit against the US government’s restrictions. For more insights into China tech, sign up for our tech newsletters , subscribe to our Inside China Tech podcast , and download the comprehensive 2019 China Internet Report . Also roam China Tech City , an award-winning interactive digital map at our sister site Abacus .