A 67-year-old New South Wales man has been charged with a further 46 child sex offences following a five-month investigation by police.

Investigators allege an estimated 500,000 child abuse images and video recordings were uncovered on computers, a hard drive and other electronic devices after a search of the man’s home in Nowra, on the South Coast, in June.

The man was initially arrested and charged him with sexual intercourse with a child under 10 years, two counts of use child under 14 years to make child abuse material, and possessing child abuse material.

After their ongoing investigations, police today charged the him with a further 46 offences.

The new charges include seven counts of use child under 14 years to make child abuse material, 32 counts of possessing child abuse material, aggravated indecent assault, aggravated sexual assault, possessing an unregistered firearm and not keeping a firearm safely.