Detectives were today continuing to question a 20-year-old man in connection with the murder of a teenage girl.

Gemma Louise Roberts, 18, was found bleeding to death in the car park of the Swan pub, Liversedge, where she had staggered for help. She had had her throat slashed in what detectives believe was a random attack.

She was able to gargle the words help me' to pub customers who desperately tried to save her life.

The spot in the car park where she collapsed was yesterday covered with floral tributes, including those from her traumatised family.

Police were also continuing to carry out thorough investigations of the crime scene, searching the nearby beck and a patch of waste ground off Holme Street which runs along the back of the Swan and where Gemma is believed to have been attacked.

It is thought they were continuing to hunt for a weapon involved in the attack.

Karen Osman, 53, the licensee of the Swan, said Gemma's mother and boyfriend had come into the pub separately over the weekend, desperate to learn more of the teenager's final moments.

She said: "Her mother was in a real state, as you would expect. She wanted to know what she had tried to say before she died. Sadly I could not tell her anymore than I had already told the press.

"The boyfriend too was really upset.

"It does get quite dark along here at night but this has come as a real shock. I think we are all just wandering round in a daze. My youngest daughter lives here and when she gets home I have been telling her not to get out of her car until she has rung me."

Among those to have left flowers at the scene were members of Gemma's family.

A card from her mother said: "Goodbye and God bless, lots of love Mum."

Another read: "Love and miss you always, your big brother, Simon."

Other tributes were left by friends of Gemma while some of the bunches of flowers had simply been left by people who had been deeply shocked by what had happened On one card the well-wisher had written: "Such a horrific way to lose your life, from the concerned parent of two teenagers."

Police have urged anyone who saw Gemma staggering towards the pub shortly after 8pm on Thursday to contact 0845 6060606, or Crimestoppers anonymously on 0800 555 111.

Witnesses can also text information by texting the word swan' and sending it to 07786 200 806.

e-mail: mark.casci @bradford.newsquest.co.uk