Detectives investigating the murder of a student whose body was found at a university halls of residence are trying to find her mobile telephone.
Two men have been arrested over Rebecca Love's death
Police were called to The Lawns, at the University of Hull in Cottingham, East Yorkshire, after 26-year-old Rebecca Love's family could not contact her.
Miss Love, from Rotherham, probably knew her killer, who may not have been a fellow student, officers said.
Police have been granted more time to question a 20-year-old man.
Another man, aged 32, was questioned and then released on Saturday night.
Det Chief Insp Tony Garton, who is leading the investigation, said: "It is important that we find Rebecca's phone as it may hold important information which could assist this investigation.
"We have searched Rebecca's room but the phone couldn't be found.
"Rebecca's friends and family tell us she had a silver-coloured Nokia phone which we urgently need to locate."
Ms Love's parents, David and Carol, issued a plea for help through Humberside Police.
In a statement the family said: "Rebecca was a 26-year-old student studying for a BSc in marine biology.
"She leaves behind her mother, father and a younger brother.
"She is deeply missed. The family are devastated by her untimely death and we ask for anyone who can help to contact Humberside Police."
Det Ch Insp Tony Garton, who is leading the inquiry, said Ms Love appeared to have been the victim of "a fairly prolonged physical attack".
"At the moment it would appear that Rebecca knew the person that she let into her room to attack her.
"There are no signs of forced entry to the room or the hall, so it would appear that there was some form of consent."
He said it did not mean that another student was involved and said it was crucial they established what Miss Love's movements were during recent days.