On Monday, the Canadian privacy watchdogs also called for a prohibition on any police deployment of the facial recognition tool that could result in mass surveillance.

Robert Williams, who is Black, spent over a day in Detroit police custody in January after Rank One's face recognition software connected his driver's license photo to surveillance video of someone shoplifting.

Almost two in three Britons disagree with police using artificial intelligence such as facial recognition technology to identify suspects, according to a survey released on Friday.