A decade after Melbourne teenager Siriyakorn "Bung" Siriboon vanished, police have made a fresh public appeal for information.
Wednesday's 10-year anniversary of her disappearance was marked by Victoria Police again releasing a photo of the 13-year-old schoolgirl.
Bung dressed in her uniform and left home about 8.30am on June 2, 2011 to walk to school in Melbourne's outer east.
The Boronia teen never made it.
Despite a number of public appeals and a reward of up to $1 million, the case continues to baffle Victoria Police.
Detective Leading Senior Constable Justin Tippett said their thoughts were with Bung's family, especially her mother Nid, father Fred and sister.
"Ten years is a long time to go without answers and I'm sure the loss of Bung feels as raw today as it did in 2011.
"Despite a significant and thorough investigation, we've unfortunately not been able to solve this case and either provide Bung's family with answers or hold the offender to account."
Apart from the reward, the Department of Public Prosecutions would also consider giving indemnification from prosecution.
Sen Const Tippett said police continue to receive weekly calls and emails about Bung's disappearance.
"As history has shown, often those involved in a crime of this nature are unable to keep it secret, so we are especially keen to hear from anyone who may have specific knowledge of the person involved," he said.
Five years ago, police released information about a vehicle similar to a white Kingswood station wagon that was seen in Rowville the morning Bung disappeared.
It may have had a young female passenger, but police have never confirmed whether it was Bung or if there was any connection to her disappearance.
A school backpack she was carrying also is yet to be found.
Anyone with information is urged to call Crimestoppers.
