SafeWork SA has confirmed it will investigate if there is a link between two fatal workplace accidents at a Kapunda business.
Emergency crews were called to JT Johnson and Sons shortly before 8am where a man was trapped in a hay bagging machine.
The 42-year-old from Kapunda died at the scene.
In December last year, a 58-year-old man suffered fatal crush injuries after he was hit by a hay baling shuttle.
He later died in hospital.
Family owned JT Johnson and Sons process hay and pellet feed for export.
In a statement, SafeWork SA said it would investigate any link.
"SafeWork SA last month laid a charge in the industrial court of an alleged breach [of the Occupational Health, Safety and Welfare Act 1986] in relation to a workplace at JT Johnson and Sons on Sunday, December 18, 2011," it read.
"SafeWork SA investigation into today’s incident will also explore any possible relationship between these two workplace fatalities."
Barossa detectives attended JT Johnson and Sons and will prepare a report for the Coroner.