US police officers shot dead a 12-year-old black boy carrying a replica gun within seconds of their patrol car arriving on the scene, a surveillance video released on Wednesday showed.
The sudden end to the incident has stoked anger at police tactics in the United States, in the wake of rioting triggered by a decision not to prosecute a white officer who killed an unarmed black teenager. Tamir Rice died in hospital in the US city of Cleveland, Ohio on Sunday when two police officers, responding to a 911 emergency call, confronted him in a city park.