Authorities in Moscow have ordered 260 million rubles ($4 million) of facial-recognition technology for surveillance cameras to monitor protests and other mass gatherings, the Vedomosti business daily reported Friday.

Moscow claims one of the world’s largest network of 160,000 surveillance cameras, some equipped with facial-recognition technology, with plans to boost the number to 200,000 this year. Supporters of the facial recognition-equipped cameras tout their role in maintaining public safety, while critics warn of false matches and surveillance overreach.

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