Police have received 20 calls so far in response to their latest appeal surrounding the disappearance of Claudia Lawrence.
The nationwide appeal by North Yorkshire Police included a feature on BBC One’s Crimewatch on Wednesday evening.
The force said 10 people called the incident room to assist the investigation following the programme.
A further 10 people contacted the police earlier in the week.
A series of new appeals for information were featured on Crimewatch, including efforts to identify two vehicles and two men seen near Claudia’s home on Heworth Road, York, at around the time she disappeared in March, 2009.
Members of the public have also been urged to go to North Yorkshire Police’s new microsite dedicated to the Claudia Lawrence investigation - www.northyorkshire.police.uk/claudialawrence - which went live at 9.30pm on Wednesday.
The Claudia microsite has been viewed 6,602 times so far and this is expected to increase over the coming days and weeks.
In addition, the appeal on the North Yorkshire Police Facebook page has been seen by 9,272 people and counting.
Crimestoppers is offering a £10,000 reward for information which leads to an arrest and conviction.
Information can be passed on anonymously.
A spokesman for North Yorkshire Police, said: “The response to Crimewatch and the wider media appeal has been very encouraging. We hope people will continue to support the Claudia Lawrence investigation by looking at the new appeals contained on the microsite.
“The investigation team is now taking the necessary time to assess the fresh information and will issue an update in due course.”
Anyone with information that could assist the investigation, contact North Yorkshire Police on 101, select option 1, and pass details to the Force Control Room. Quote “Claudia Lawrence” when passing on details.
Information can also be passed to Crimestoppers anonymously on 0800 555 111, quoting “Claudia Lawrence, North Yorkshire Police”. Alternatively, go to www.crimestoppers-uk.org and fill in an Anonymous Online Form.