A man has been charged with murder after the bodies of a mother and son were found inside a home in Adelaide's north-west yesterday.
Acting Assistant Commissioner Graham Goodwin said a family member made the grim discovery at the home on Rosetta Street in Rosewater about 1.20pm.
A 76-year-old woman and a 55-year-old man were found dead after sustaining "significant injuries", police said.
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Police were called to the scene, before quickly arresting a 43-year-old man of no fixed address nearby.
He has since been charged with two counts of murder.
Acting Assistant Commissioner Goodwin said the attack was not believed to be random.
"The relationship between the suspect and the occupants of that address is unknown," he said.
"It is suspected that they were known to each other, but at this stage, we don't know what that relationship was."
The 43-year-old man will appear before the Port Adelaide Magistrates Court tomorrow.