Public join search for missing Haydn Evans, 18
More than 1,400 people have joined a public appeal to find a Flintshire teenager missing for a week since leaving a Christmas party.
Haydn Evans, 18, from Mold disappeared after leaving Carden Park Hotel in Cheshire on 17 December at 01:00 GMT.
Farmers have been asked to check outbuildings and police are also urging walkers to keep a look out.
For the past week 70 officers have been involved in a hunt, including a specialist underwater search team.
A volunteer search and rescue group have also been involved in the hunt.
The public appeal about his disappearance has started to attract widespread support since being launched on the Facebook social network site.
Celebrities including TV fashion guru Gok Wan and comedian Freddie Starr have helped to raise awareness by circulating the appeal to their followers on social media sites like Twitter.
Police have contacted the National Farmers' Union (NFU) to urge landowners to check outbuildings and land in the rural area surrounding the hotel close to the Welsh-Cheshire border.
A Cheshire police spokeswoman said officers were continuing to carry out "scattered and targeted searches" with some areas being re-searched.
However, in response to claims on Facebook that police had not taken up offers of help from Mr Evans' friends, she explained that something may be missed by any would-be helpers.
"While we're asking farmers and other people in the area to check their properties, the search operation has to be carried out by professionally trained officers who know exactly what to look for," she said.
"If other untrained people were involved it could mean that something is missed."
The police spokeswoman said Mr Evans' family and friends have been encouraged to spread news of the appeal as widely as possible and which included using sites like Facebook and Twitter.
Officers have said previously he may have become disorientated with the extreme cold and unfamiliar surroundings after attending the Christmas party organised by his employers, a Mold construction company.
He was not wearing a coat or jacket when he was last seen.
Mr Evans is about 5ft 9in (1.76m) and slim, with short brown hair and blue eyes, and was last seen wearing a dark long-sleeved shirt and trousers.
Anyone who travelled on the A41 Whitchurch road or A534 Wrexham road and may have seen him is asked to contact Cheshire Police on 101.
The hotel is east of Wrexham and 12 miles south of Chester off the A534, near Clutton.
On Tuesday Mr Evans' stepsister Jade Conway issued a direct plea to him to get in touch, saying: "Haydn, we are all devastated about your disappearance.
"If you are listening to this, or have seen the appeal for you, please contact us."