A man was shot dead after police responded to reports of an argument in the early hours.
The shooting happened at around 2am in Swindon, with locals reported hearing loud bangs and shouting before ambulances arrived.
Police have since cordoned off the road in Rodbourne, Swindon, while nearby footpaths and alleyways have also been closed off to the public.
A police watchdog has launched an investigation into the man’s death after Wiltshire Police were called to the incident.
A statement said: ‘The Independent Office for Police Conduct (IOPC) has begun an independent investigation following an incident involving officers from Wiltshire Police in Summers Street, Swindon, at just after 2am on November 8.
‘At this early stage it is believed a 57-year-old man has been fatally shot during the police response to reports of two men arguing in the street. He was declared dead in an ambulance at 2.56am.
‘Our thoughts and sympathies are with all of those affected by this terrible incident.
‘IOPC investigators are at the scene and the post-incident procedures where the key police witnesses will provide their initial accounts.
‘It is mandatory for us to conduct an independent investigation when the police fatally shoot a member of the public. We have established protocols with the police to ensure our investigations do not hinder their ability to conduct enquiries as part of their related investigations.’