Police searching for missing Hull University student Libby Squire have been given extra time to continuing questioning a 24-year-old man.
The man was arrested on Wednesday on suspicion of abducting the 21-year-old philosophy student.
On Friday, Humberside Police said a senior officer had granted permission for further detention of the man in custody.
A spokeswoman said Miss Squire has still not been found.
We'd like to thank everyone who has helped this week in trying to find Libby.
We have been overwhelmed with people's kindness and support and it's been incredible how all her friends, students at the university, and members of the public have joined together to help us look for her.
She was reported missing from the city in the early hours of February 1st and an intensive search has been mounted by police and volunteers over the last week.
On Thursday night, a week since Miss Squire disappeared, police handed out leaflets and drove a large screen featuring images of the missing student around the city centre.
Police said more than 50 student volunteers had joined their efforts by helping to give out flyers.
The address where the man was arrested is about half a mile from Miss Squire's home.
Officers have said Miss Squire was dropped off in a taxi near her home on Wellesley Avenue at 11.29pm on Thursday January 31 and was seen 10 minutes later on CCTV near a bench on Beverley Road, where a motorist stopped to offer help.
She is believed to have been in this area until about 12.09am on Friday.
Police said the taxi driver and motorist have been spoken to and are not suspects.
Pawel Relowicz, of Raglan Street, Hull, appeared at Hull Magistrates' Court this (Thursday) morning
A newly-released clip of the missing Hull student shows her smiling and apparently joking with friends
Detectives investigating the disappearance of Hull student Libby Squire want to trace four people who may have vital information.