More sex complaints over Vic school

More men have complained of alleged sexual abuse at a Victorian Catholic boarding school in the 1970s and 80s.

Police say the new information has broadened their probe into St Patrick's College at Sale, because it implicates more former staff members in the suspected historical abuse.

An investigation began after police received a number of complaints from men who attended the boys-only college in the 1970s and 80s.

Detective Inspector Stephen Dennis says more former students, aged 9 to 16 at the time, have come forward after police issued a call for other victims.

He says it's now apparent the alleged incidents were not isolated.

"Callers from throughout Australia and overseas have been in contact with Sano Taskforce investigators in Melbourne, and have indicated that other former school employees may be implicated in the sexual abuse of students," he said in a statement on Wednesday.

Detectives were previously focused on one suspected offender.

An 87-year-old former school employee has been interviewed, but he was released pending inquiries.