It may sound like the plot from the latest science fiction blockbuster, but police robots have taken to the streets of Beijing to control crowds.
The robots are fitted with facial recognition software that can sense danger, as well as an extendable electroshock arm.
The machines are being trialled this week during China’s national holiday, known as Golden Week, and it is unclear when, or if, authorities plan to use them regularly.
There were spotted this week outside the National Museum next to Tiananmen Square.
The metal robots are white and have a police badge emblazoned on them.
The robot are fitted with a speaker that demands tourists to ‘please queue in an orderly fashion and cooperate with security inspections.’
The robot adds: ‘Please produce your identification documents and do not push or shove.’
Authorities hope that the use of the robots will relieve pressure on real police officers.
The Beijing trial comes shortly after slightly friendlier-looking robots, called AnBots, began patrolling the departure hall of terminal three at Shenzhen International Airport in southern China.
The 4ft 9in robot has four high-definition digital cameras and is able to use mobile face recognition.
Images are then passed on to security stations where they will be analysed.
The 165-pound robot is designed with four main capabilities which are independent patrol, face recognition, intelligent service and emergency response.
The droids have a top speed of 11 miles per hour (18kph) and can even taser people, although the taser is activated by someone in the control room.