Police are investigating alleged abuse of children at the Daruk Training School at Berkshire Park between 1965 and 1985.

Former Macquarie MP Alasdair Webster, who was born at East Maitland, was chief superintendent at Daruk from 1973 to 1984. However, police have not suggested that Mr Webster was involved in the alleged abuse.

Allegations were made on Sunday night’s 60 Minutes program that Mr Webster turned a blind eye to the situation. Mr Webster denied those allegations.

When asked about the claims against Mr Webster on Monday, Detective Superintendent Brett McFadden told reporters he would not go into specific persons of interest, but said police wanted to hear from Mr Webster.

A 67-year-old Jindalee man has been arrested as part of the investigations. He was extradited to NSW and faced the Penrith Local Court on Friday, March 2 on 19 historical charges including indecent assault on a male and buggery.

The charges relate to the alleged sexual abuse of boys, aged 12 and 13, in the late 1970s.

Investigators have spoken to numerous witnesses and taken statements from a large number of alleged victims, who were mostly aged between 10 and 14 at the time.

They have also inspected thousands of historical government documents as part of their investigation.

Detective Superintendent Brett McFadden said charges against more people were imminent.

The investigations come under Strike Force Eckersley, which was established by the Nepean Police Area Command in late 2016 following a series of complaints made to the Royal Commission into Institutional Responses to Child Sexual Abuse.

The strike force continues to investigate a range of other matters.