A man's died after a domestic assault at Parafield Gardens in Adelaide's north.
Officers responded to reports of a domestic disturbance at a house in Bardsley Avenue at about 2.30am.
They arrested a man over the alleged assault and were escorting him from the property when he suffered an apparent medical episode and collapsed.
He received first aid and C-P-R from officers until ambulance officers arrived but died at the scene.
Major Crime detectives are investigating the cause and circumstances.
A report is being prepared for the Coroner.