The “thorough” search for clues by police investigating the death of Blackpool teen Paige Chivers is now into its second week.
Detectives are scouring a field off Faraday Way in Bispham as part of an investigation into the disappearance of the 15-year-old, who has not been seen since 2007.
Police, who remain tight-lipped about the search, believe she was murdered but her body has never been found.
The land has been cordoned off since last Monday while forensic investigators carry out their work. It is not known how long they will remain.
A number of high profile searches over the years, including land by Old Hallows Church in Bispham last year, have so far proved fruitless.
Lancashire Police and Crime Commissioner Clive Grunshaw said: “Having visited the scene, I was impressed with the expertise on site.
“I will give whatever support is necessary to aid the investigation, and I hope it provides some answers for everyone connected with this tragic case.”
Two people are due to face trial over the disappearance of Paige.
Robert Ewing, 60, of Kincraig Place, Bispham, denies murder and perverting the course of justice. Gareth Dewhurst, 45, of Duncan Avenue, denies assisting an offender in disposing of a body, intending to pervert the course of justice and an alleged sex offence.
The 12-week trial is due to start on April 14.