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.