Malaysian Police have refused to set a time limit to continue the search for missing Irish teenager Nóra Quoirin.
The search is now in its eighth day, but authorities are still no closer to a breakthrough.
She disappeared last Sunday from the Dusun Holiday Resort near Kuala Lumpur, where she was staying with her parents.
Nóra lives in London with her mother Meabh - who is from Belfast - and her French father Sebastien.
A Malaysian Police official told a press conference on Sunday they had spoken to every villa near to where the 15-year-old was staying.
He also said they were aware of reports that a truck that was heard in the vicinity at around 3.00am when she went missing.
While he refused to comment on reports that the Quoirin family were prepared to offer a reward for information in relation to her disappearance.
Authorities previously said they were "very worried about [her] welfare" as they did not know how long she could survive.
Police have questioned a taxi driver who took Nóra's family to the resort.
Homes of the resort staff have also been searched as part of the investigation.
More than 300 people have been taking part in the search operation over the past week.
In a statement following Saturday's search, police said they were focusing on an area because they believe Nóra "will not go far".
The search area is focused on steep areas, shrubs and rocks - as well as the lodge from where she went missing.
A Malaysian hotline has also been set up for people to call if they have any information: 0111-2285058.
On Saturday, Nóra's mother Meabh thanked everyone involved in the operation.
She told them: "We want to say thank you to each and every one of you - we know you're searching night and day for Nóra.
"We see you working so hard and also praying with us, being with us.
"We know you have given up your time - especially at a special festival time - to be with us here, it means the world to us, and we are so grateful for everything that you are doing for us".
"We are extremely impressed with the effort, your expertise, your dedication.
"And we hope you find Nóra and thank you so much - terima kasih" [Malay term for 'thank you'].