The sister of a missing teenage girl with a medical condition who vanished after taking out the rubbish at home almost a week ago has made an emotional public appeal for information.
Nida Ul-Naseer, 18, of Newport, south Wales, has not been seen since she stepped outside at her home in Linton Street at 8pm last Saturday.
A major police search operation involving sniffer dogs and officers on horseback is continuing in open areas close to her home.
Sister Naila Anwar appealed for information today and said the whole family "miss Nida desperately."
"We miss Nida desperately and want her to come home. We want her to know that she is not in trouble at all and we are worried that she could be unwell because of her condition," she said.
"What is more worrying is that she has missed mum's birthday which is extremely unlike her.
"We would appeal for anyone with any information, no matter how small, to get in touch with the police on 101."
The brief public appeal was made during a press conference.
Gwent Police Assistant chief constable Paul Symes, who was also present, went on to reveal that the teenager may have been upset after a disagreement at home.
"We know that Nida went out that Saturday evening at about 8pm to take the bins out without her purse or telephone and didn't return," he said.
"We believe that she had a verbal disagreement within the home which possibly could have upset her and led to her leaving. There is nothing to account for her disappearance.
"Whilst we are pursuing a number of lines of enquiry, there is no information at this stage to suggest that she was picked up in a vehicle at all."
He added: "We have been working closely with Nida's family, local agencies as well as the community, to ensure we have all the information we need about Nida in particular about her friends and lifestyle to give us as much opportunity as possible to take the investigation forward and locate her.
"To go missing is particularly out of character for Nida and that, as well as her medical condition, makes me very concerned for her welfare."
Police previously said the teenager is in need of medication without which she is likely to become anaemic.
It is not known what the condition is from which she suffers and it is understood that the family declined to elaborate on it.
The teenager is of Asian-Pakistani appearance with long dark hair and is slim and 5ft 3in tall. She was last known to be wearing blue jeans and a black top.
Chief Inspector Daniel Taylor, the officer leading the search, previously appealed for anyone who knows Nida to come forward with information they may have about her social circle.
"There must be other people out there who know Nida who are not necessarily known to the family," he said.
"If anyone can assist us with our enquiries to locate Nida, they are asked to call 101 and quote log number 448 28/12/13."