Relatives discover woman's body in SA home after 'unexplained death'

A dead woman's relatives have found her body at a home in South Australia's mid north with police investigating the "unexplained death".

Police were called to the house in Mitchell Street, Whyalla last night after the body of a woman, believed to be in her 30s, was discovered by members of her family, police said.

Detectives from the Major Crime squad are flying to Whyalla, 400km northwest of Adelaide, to assist local police with the investigation.