Microsoft says tech firm that Beijing allegedly uses to track Muslims lies about a ‘partnership‘

denied that it has any connection with a controversial Chinese facial recognition app that rights groups say is being used by Beijing to track minority Muslims in .

The company, called SenseNets, sells facial recognition and crowd analysis technology that is designed to detect unusual behavior in large groups of people, according to its website.

SenseNets suffered a data leak in February which was discovered by security researcher Victor Gevers. He revealed that personal information on 2.5 million people tracked by the company was publicly available. Gevers found that most of the records were collected in China‘s Xinjiang province, a region in the west of China with a large population of minority Uighur Muslims.