Four men have been arrested on suspicion of murdering a Worksop woman 10 years ago.
Karen Black, aged 36, from Lancastrian Way, Worksop, disappeared in 2006 and her body has never been found.
She was last seen at a guesthouse in Cleethorpes in early November, 2006.
She had visited a friend in Doncaster a few days before and travelled by train to Cleethorpes, where she checked into a guesthouse.
Yesterday Nottinghamshire Police arrested four Cleethorpes men, aged 40, 45, 54 and 58, on suspicion of murder.
The arrests came following a review of long-term missing person cases.