A man has been stabbed to death, two other people seriously injured and three people arrested for murder during a night of violence in Adelaide's northern suburbs.
The first of two serious stabbings, only streets apart, was reported just after 7.30pm on Tuesday.
Police and paramedics were called to Afford St in Elizabeth Grove after reports of two people being stabbed during a fight in the street.
As police and paramedics arrived they found a man and a woman with serious injuries.
A 36-year-old man was treated at the scene before being rushed to the Royal Adelaide Hospital in a critical condition.
He died shortly after arriving at the hospital.
A 36-year-old woman was also taken to the RAH for treatment of a stab wound to the shoulder. Her injuries are not considered life threatening.
Shortly after arriving at the scene police arrested a 37-year-old Ottoway man over the stabbings.
The 30-year-old Elizabeth Grove women were taken to Lyell McEwin Hospital for treatment of injuries and were also arrested and taken into custody.
Just after 10pm Northern District Police with the Dog Operation Unit and Major Crime Detectives scoured Afford St, locating another man believed to have been involved in the incident.
The 34-year-old Salisbury Plains man was also arrested.
Both men were being interviewed by police on Tuesday evening and, along with the woman, are expected to be charged with murder.
Police believe all parties knew each other and the incident was not random.
The State Emergency Service is providing lighting to crime scene investigators examine the scene.
As police swarmed to Afford St, only a few hundred meters away another serious stabbing occurred.
Police were called to Elizabeth South, near Hogarth Rd, just before 11pm after a man was repeatedly stabbed.
A woman is being interviewed by police over the incident.
The man's condition is believed to be critical.