It was lockdown in the Indian city of Hyderabad when activist S Q Masood was stopped on the street by police who asked him to remove his face mask and then took his picture, giving no reason and ignoring his objections.

Worried about how the photographs would be used, Masood sent a legal notice to the city’s police chief. But after receiving no response, he filed suit last month over Telangana state’s use of facial recognition systems – the first such case in India.

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