A New South Wales police officer has been charged with child sexual assault offences, following an investigation by the Professional Standards Command.

A New South Wales police officer has been charged with child sexual assault offences, following an investigation by the Professional Standards Command.

During the investigation launched last year into alleged historical offences, a report was made to police alleging a nine-year-old girl had been sexually assaulted in the Central Coast region in 2009.

During the investigation launched last year into alleged historical offences, a report was made to police alleging a nine-year-old girl had been sexually assaulted in the Central Coast region in 2009.