Four men arrested on suspicion of murdering Claudia Lawrence in York have been re-bailed while enquiries continue.
All are aged in their 50s and from the York area.
One was arrested on March 23rd 2015, and three were arrested on May 22nd 2015.
Claudia Lawrence was last seen on 18 March 2009.
She was 35 years old when she disappeared and working as a chef at the University of York.
Police are treating her disappearance as a murder investigation.
Her body has not been found.
Three men arrested on suspicion of murdering Claudia Lawrence have been released on bail.
The men, who are aged in their 50s and from the York area, were held in custody while being interviewed by detectives from the Major Crime Unit.
Although they have been released from custody, the case remains active and enquiries are ongoing.
Detectives are continuing to question three men over the disappearance of York Chef, Claudia Lawrence.
The men, all in their fifties, were arrested yesterday on suspicion of murder.
Police say searches are expected to continue over the coming days.
Police investigating the disappearance of Claudia Lawrence say that identifying three men arrested today could damage the investigation.
As with the previous arrest last month, I strongly advise the media and members of the public against identifying the men who have been arrested. This is to ensure the investigation and legal process are not compromised or potentially damaged in any way. This includes naming or publishing images of the men, their home addresses, places of work, their vehicles and properties being searched on traditional media platforms or social networking sites. I urge everyone to again show restraint and patience while we carry out these very important enquiries. Your co-operation and support is greatly appreciated by the investigation team.
Police investigating the murder of Claudia Lawrence have arrested three men on suspicion of murder.
They are all aged in their 50s and from the York area.
Another man was arrested in March this year and remains on police bail.
Officers say Claudia has not been found, but her family has been informed of the arrests.
Detectives investigating the disappearance and suspected murder of Claudia Lawrence have today (April 14) released a 47-year-old man from bail.
He was arrested on 23 July last year on suspicion of perverting the course of justice.
The decision to release him from his bail conditions has been made following consultation with the Crown Prosecution Service and following information the man provided to police which has progressed the investigation and clarified certain issues.
Another man in his 50s was arrested on suspicion of murder on March 23.
Police have urged people not to identify this arrested man under any circumstances because identification is an issue in the case.
This includes his name, photograph, home address, place of work or any vehicles connected to him.
Here's a look at the sequence of events since Claudia Lawrence went missing in York six years ago.Read the full story ›
Previously unseen CCTV footage has been released in connection with the Claudia Lawrence investigation. It's hoped it may lead to new information about her disappearance six years ago.
The footage shows two people police want to identify. They were caught on camera shortly before Claudia last spoke to her parents on the phone.
The person seen walking down Heworth Place, which leads to the back of Claudia's house, is of particular interest.
Previously unseen CCTV has been released in connection with the disappearance of York chef Claudia Lawrence.Read the full story ›
Claudia Lawrence's father Peter Lawrence says he has spent six years missing her smile and laughter.
Mr Lawrence told a news conference it "is galling" that there are people in the community who know what happened to Claudia, but who aren't coming forward.
He added: "If she has been murdered, as we believe, then I just want to bury her."