Legislators in San Francisco have voted to ban the use of facial recognition, the first US city to do so.
The emerging technology will not be allowed to be used by local agencies, such as the city’s transport authority, or law enforcement.
Additionally, any plans to buy any kind of new surveillance technology must now be approved by city administrators.
Opponents of the measure said it will put people’s safety at risk and hinder efforts to fight crime.
Those in favour of the move said the technology as it exists today is unreliable, and represented an unnecessary infringement on people’s privacy and liberty.