An Australian man who was fatally stabbed in Sweden managed to walk several hundred metres along a street before collapsing.

The 30-year-old was found in Odinsplatsen, a public space in the middle of the city of Gothenburg, at 4.50am on Wednesday morning, Swedish time.

He was suffering severe spinal and abdominal injuries and later died in hospital.

Police believe the assault may have taken place in Drottningtorget, closer to Gothenburg's central station, several hundred metres from where the man was found.