The Metropolitan Police has announced it will use live facial recognition cameras operationally for the first time on London streets, APA reports citing BBC.
The cameras will be in use for five to six hours at a time, with bespoke lists of suspects wanted for serious and violent crimes drawn up each time.
Police say the cameras identified 70% of suspects but an independent review found much lower accuracy.
Privacy campaigners said it was a "serious threat to civil liberties".
Following earlier pilots in London and deployments by South Wales police, the cameras are due to be put into action within a month.
Police say they will warn local communities and consult with them in advance.