Bordertown, South Australia police officer shooting: Sergeant Jason Doig killed

An experienced and well-known police officer was shot dead during a violent confrontation in South Australia has been identified as Brevet Sergeant Jason Doig.

The officer and colleagues Constable Rebekah Cass and Sergeant Michael Hutchinson went to a property in the rural community of Senior near the Victorian border in the state's south-east about 11.20pm on Thursday to investigate reports that a dog had been shot.

They were confronted by an armed man and Sergeant Doig, 53, was shot.

His colleagues and paramedics attempted to save him but he died at the scene.

Sergeant Doig had been in the police force for almost 35 years and was stationed Lucindale Police Station.

Sergeant Hutchinson was also shot and sustained non-life-threatening injuries and was taken to an Adelaide hospital for treatment.

Constable Rebekah Cass was uninjured.

South Australia Police said the male suspect, 26, was shot by police and sustained serious life-threatening injuries.

He was airlifted to Adelaide for treatment where he remains  in hospital under police guard.

Major crime detectives, forensic response and internal investigation officers were still at the scene on Friday.

SA Police Minister Joe Szakacs said he was in communication with SA Police Commissioner Grant Stevens through the night.

'A heinous act of violence has taken the life of a SAPOL officer, and seriously injured another,' he posted on X, formerly known Twitter.

'This is unthinkable, tragic and shocking.'

Mr Stevens travelled to the scene on Friday morning and is expected to address the media later in the day.

SA Premier Peter Malinauskas said he has been briefed about the 'terrible news' and will have more to say.

Foreign Minister and SA Senator Penny Wong said her thoughts were with the slain officer's loved ones and the police community.

'Every day, police risk their lives to keep us all safe,' she posted on X.

'I'm devastated for the family of a South Australian officer killed while protecting our community.

'We hope for the full recovery of his injured colleague.'

Federal Opposition Leader Peter Dutton said the community should stop and pause to say thank you to police officers for the work they do.

'A person has died and a family have lost a loved one,' he told Nine's Today Show.