A 60-year-old man of Stake Hill will appear before the Mandurah Magistrates Court today charged with child sexual offences.
It will be alleged between December 2014 and May 2015, the man sexually assaulted a six-year-old girl who was in his care at the time.
The man is no longer a foster carer but was at the time of the incidents.
He has been charged with sexual penetration of a child under 13 years and indecent dealings of a child under 13 years.
If you are or have been a victim of child abuse, or if you have information about someone being abused, contact police on 131 444.