ABC News:

An 11th man has been charged by police investigating sexual assaults on students over more than 40 years at two boarding schools in central western New South Wales.

Strike Force Belle is investigating former teachers and staff at Saint Stanislaus College and All Saints College in Bathurst over allegations of a series of sexual assaults between 1960 and 1993.

Yesterday, police arrested a 67-year-old man at a home in Newington, in western Sydney, over an alleged assault on a student in the 1970s.

The man has been charged with three counts of indecent assault on a male under 18.

He was granted conditional bail to face Downing Centre Local Court on Thursday.

Eleven men have been arrested by the strike force since August 2008.