Four people have been arrested in Townsville including one man who has been charged with more than a hundred child sex offences following the closure of Operation Sierra Phonology.
Detectives from the Townsville Child Protection Investigation Unit will allege a 39-year-old man who was employed as a child care worker was indecently assaulting children and recording the offences.
It is also alleged he took images of his victims and distributed them over a number of years.
He has been charged with 104 offences including multiple counts of rape, indecent treatment, bestiality, making and distributing child exploitation material and supplying dangerous drugs.
He is due to appear in Townsville Magistrates Court on September 29.
Police are appealing for anyone else who may have concerns they or their children have been in company of the offender to come forward.
As part of the Operation a 33-year-old West End man was also charged in July with 15 offences including six counts of distributing child exploitation material as well as possessing child exploitation material, use carriage service to access child abuse material, producing and possessing dangerous drugs and possessing tainted property.
A 38-year-old woman appeared in Townsville Magistrates Court on September 8 in relation to three offences of possessing child exploitation material, distributing child exploitation material and burglary.
A 49-year-old woman was cautioned on three counts of bestiality.
Investigations are continuing.