A man has been arrested in Devon and is being questioned in connection with the disappearance of Leicester woman Anne Simpson eight years ago.
Lincolnshire Police have begun searching Lakeside Caravan Park at Sutton on Sea.
It comes after an anonymous phone call from a public telephone box in Wigston, Leicester..
60-year-old Mrs Simpson was last seen in Skegness, Lincolnshire, on 26th September, 2004.
Police say the case is not being treated as a murder inquiry.