"PLEASE come back home Nida, please come back home. We all need you, we can't live without you. "

That was the desperate message today from the family of a missing Newport woman who vanished without trace on December 28, as they appealed again for her to return home.

Police have described 18-year-old Nida Naseer's disappearance as "a complete mystery".

The teenager was putting rubbish bags outside her family home on Linton Street, Pill, three days after Christmas when, without shoes or mobile phone, she disappeared into the night at around 8pm.

At a press conference today Superintendent Mark Warrender said there had been no confirmed sightings of the former Duffryn High School pupil, whose family are failed asylum seekers from Pakistan, and in fact there had been no new information whatsoever since December 28.

This is despite ongoing police checks going through Miss Naseer's mobile phone, computer and financial records to establish whether she planned to leave, and distributing leaflets to motorists and residents in Pill.

Extensive physical searches of the nearby area, house-to-house enquiries and speaking at length to Miss Naseer's family and friends has so far provided no new information.

When asked whether Miss Naseer was wearing shoes when she left, as previously the family indicated she left them behind, Supt Warrender said: "She may have been without shoes. If she planned to leave she may have had something with her."

The Gwent Police investigation has seen the force get in touch with other organisations and agencies, but any decision to collaborate with other forces across the UK or abroad would be up to the senior investigating officers, said the Superintendent.

Described as a very religious, quiet person, who was never without her 22-year-old sister Shamyla, the Coleg Gwent student dreamed of going to university to become a finance or marketing manager.

But when the family's asylum application was rejected a year ago and Miss Naseer became depressed about not being allowed to go to university or get a job in the UK, said Shamyla.

Speaking directly to her sister Nida, she said: "We are all worried about you, we all need you, we can't live without you.

"Nida please come home, we are desperately worried about you, we need you, please come back home. You mean a lot to us."

When asked about a disagreement between the family and Nida on December 28, in which Nida expressed frustration that friends with worse grades could go to university and she could not, her sister said: "It wasn't a dispute, she just wanted to go to uni. Because we are asylum [seekers] she can't go to university, it's not for religious reasons. She was angry about that. It made her depressed.

"She wasn't happy with college coursework, she said 'I have already done it, why am I doing it again'.

"It wasn't our fault, it's the asylum process," said Shamyla. "We are from Pakistan and have been here for five years. We are here because of a religious basis, because we are not safe in our country."

Miss Naseer's father, Dr Naseer Tahir, said he was sad he could not provide a university education for his daughter.

"She was crying," he said of the afternoon of December 28 when he last saw his daughter. "I'm not able to provide education as she wanted. I'm the head of the family. That time, she blamed us. I said, 'we will do everything, maybe next year'."

Speaking directly to his daughter he asked her to return home. "We are worried about your future, come to home," he said.