San Francisco's decision Leading body of Bosses has casted a ballot to allow the city's police to utilize robots that can kill.
The action grants police to send robots furnished with explosives in outrageous conditions.
Dr Catherine Connolly, from the gathering Stop Executioner Robots, said the move was a "elusive slant" that could remove people from killing.
The city's police - the SFPD - told the BBC they presently work no robots outfitted with deadly power.
They said however that there might be future situations in which deadly power could be utilized by a robot.
A representative for the police said "robots could potentially be equipped with explosive charges to breach fortified structures containing violent, armed, or dangerous subjects".
They likewise said robots could be utilized to "incapacitate, or disorient violent, armed, or dangerous suspects who pose a risk of loss of life".
Advocates for the action said it would just be utilized in outrageous circumstances.
Rivals, notwithstanding, say the authority could prompt further militarisation of the police force.
The action passed, with a change on Tuesday indicating that officials could go for the kill in the wake of utilizing elective de-heightening strategies.
The board likewise specified that main a predetermined number of high-positioning officials could approve its utilization.
This sort of deadly robot is as of now being used in different pieces of the US.
In 2016, police in Dallas, Texas, utilized a robot outfitted with C-4 unstable to kill a sharpshooter who had killed two officials and harmed a few more.
The SFPD said the office presently claims no robots equipped with deadly power, however said the action may be required from here on out.
"No policy can anticipate every conceivable situation or exceptional circumstance which officers may face. The SFPD must be prepared, and have the ability, to respond proportionally," a representative said.
The central government has long administered military grade gear, disguise regalia, blades and reinforced vehicles to help neighborhood policing.
However, a California state regulation spent for the current year presently requires city police powers to stock military-grade hardware and look for endorsement for their utilization.
Dr Catherine Connolly, from the mission bunch Stop Executioner Robots, said the move could "make people increasingly more far off from the utilization of power and the results of the utilization of power".
She additionally said the action could make it "easier to make decisions to use lethal force in the first place".