Hikvision’s audio and video surveillance equipment plays a key role in its mass detention centers, which essentially are concentration camps, which hold more than 1 million ethnic Uighurs and other Muslims.

In a move that could significantly impact China’s monitoring of its citizens, the U.S. administration is considering imposing limits to Chinese video surveillance firm Hikvision’s ability to buy U.S. technology.

If Hikvision is placed on the U.S. Entities List, it will have to obtain U.S. government approval for purchasing components, including chips, for its products. Its supply chain will be significantly effected.

Last week, the U.S. Commerce Department placed Huawei Technologies on the blacklist

thus effectively banning U.S. companies from doing business with it citing Huawei’s business relations with Iran which is contrary to U.S. national security.

The White House did not immediately respond to a request for comment on the report.

With the news reaching the market, Hikvision’s shares opened 10% lower.

“The chips Hikvision uses are very commercial and most of the suppliers are actually in China although there are some in the United States,” said an executive from Hikvision who declined to be named given the sensitivity of the matter. She went on to add, “Even if the U.S. stops selling them to us we can remedy this through other suppliers”.

Hikvision and Dahua Technology which produce audio-visual equipment that can be used for surveillance were specifically cited in a letter to Trump’s top advisers last month, signed by more than 40 lawmakers.

In their letter, the lawmakers said China’s actions in its western region of Xinjiang “may constitute crimes against humanity” and urged tighter U.S. export control measures to ensure that U.S. companies are not assisting the Chinese government’s concentration camps there.

China is facing growing international condemnation for its mass detention centers which hold more than 1 million ethnic Uighurs and other Muslims.