SA man charged with child sex offences

A South Australian man has been charged with sex offences after allegations were raised at the child abuse royal commission.

The man, aged in his fifties, from Peterborough in the state's mid-north, was arrested on September 2 after a woman told the national inquiry of her abuse while in state care in the 1980s.

The man was charged with 18 counts of unlawful sexual intercourse, two counts of indecent assault and one count of assault occasioning actual bodily harm and has been bailed to appear in Adelaide Magistrates Court at a later date.

This is the first arrest in the state based on evidence heard at the Royal Commission into Institutional Responses to Child Sexual Abuse and SA police have not ruled out further arrests.