Nora Quoirin, 15, went missing on the first night of a family holiday in Malaysia, at a resort near Seremban, around an hour south of capital Kuala Lumpur.
4 August: Nóra was reported missing after her father discovered she was not in her bedroom at the Dusan Resort at around 8am on Sunday.
The window was also open in the room that Nóra had been sharing with her two siblings.
5 August: A British charity said that Malaysian police were treating Nóra's disappearance as a potential abduction, but officers denied there was any foul play involved.
The Lucie Blackman Trust, a charity supporting missing people abroad, said police believed the teenager could have been taken.
However, speaking to press on Monday afternoon, Che Zakaria Bin Othman, deputy police chief of Negeri Sembilan, said: "So far there's no indication of foul play, however investigations are still ongoing."
6 August: Nóra's family said they believed her to have been abducted.
A statement said: "Nóra's family believe she has been abducted.
"We are especially worried because Nora has learning and developmental disabilities, and is not like other 15-year-olds.
"She looks younger, she is not capable of taking care of herself, and she won't understand what is going on.
"She never goes anywhere by herself. We have no reason to believe she wandered off and is lost."
7 August: Police said they were analysing unidentified fingerprints found in the family's hotel suite.
The prints were at an open window in a downstairs hall, not in the bedroom upstairs where the girl was sleeping with her siblings, deputy police chief Che Zakaria Othman said.
9 August: Police investigated whether footprints found in the forest where Nóra went missing belonged to the missing teen.
State fire and rescue department assistant director Ahmad Mukhlis Mokhtar told journalists: "Previously, our detective canines had spotted footprints, but when we conducted a search there, we couldn't find her."
Nóra's family also revealed more about her condition, holoprosencephaly, as search crews played recorded messages from her mother, Meabh, through the forest in an attempt to reach her.
They said in a statement: "Nóra is not like other teenagers. She is not independent and does not go anywhere alone.
"Nóra can read like a young child, but she cannot write more than a few words. She has a good memory but she cannot understand anything conceptual. She is unable to do maths and so things like money are impossible to manage.
"She cannot make or receive phone calls independently."
10 August: Nóra's family thanked the search teams involved since the teenager's disappearance.
Her mother and father, Meabh and Sebastien Quoirin, said: "To be with us here, it means the world to us. We are so grateful for everything that you are doing for us, everyone who is helping here and not from here.
"We are extremely impressed by the effort, your expertise, your dedication and we hope you find Nóra.
"And thank you so much."
11 August: Nora is missing for a week, with hundreds of rescuers still involved in the search operation.
12 August: A Belfast-based business offers a €10,900 reward for information on Nóra's whereabouts.
Officers from the UK's National Crime Agency, Scotland Yard and An Garda Síochána are supporting Malaysian authorities in the search for Nóra.
13 August: Police in Malaysia say a body has been found in the search for Nóra. Her family later confirmed that the was body was that of the missing teenager.