Warning: This story contains references to child sexual assault.
Police have released images linked to historic child abuse investigations in the hope the public can help them solve cold cases.
Helen Schneider, Acting Assistant Commissioner at the Australian Federal Police, said the four background images could serve as clues that could help crack cases and potentially remove vulnerable children from harm.
The photos include a room with a fireplace, a bed frame with a built-in radio and two linked images featuring a "distinctive brick wall pattern" and "yellow curtains".
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Police believe they have been taken in Australia.
Schneider said members of the public could view the images and report any information about them on the Australian Centre to Counter Child Exploitation (ACCCE) website.
"Victim identification specialists have the painstaking task of going through images and videos frame-by-frame to identify anything that helps with the origin, location or the identity of a victim," Schneider said.
"Your leads can make or break an investigation and every tip could make all the difference for a vulnerable victim.
"No child should have to endure sexual abuse and our team of investigations will never give up the fight, but we need every member of the community to be our eyes and ears to help police save victims and arrest perpetrators.
"If you recognise an object and any details about its origin, please report it via the ACCCE website.
"You can do so securely and anonymously.
"No clue is too small. Your small tip could be the information we need to rescue a child from significant harm."
The images have been released as a part of the program 'Stop Child Abuse – Trace an Object', which is based on an initiative devised by Europol in 2017.
The AFP has had 908 tip-offs from the public as of August 30.
Support is available from Kids Helpline on 1800 55 1800, Bravehearts on 1800 272 831 and the Blue Knot Foundation on 1300 657 380.