More than 50 police officers have joined in the hunt for a 53-year-old woman who vanished six days ago.
Hilary Ball was last seen leaving for work on Monday 13 December
Hilary Ball, from Horsted Keynes, West Sussex, was last seen on Monday morning as she left for work in Haywards Heath.
She never arrived and the alarm was raised but since then, police said there have been no sightings of her.
Forty police search officers and 28 volunteers have been working with 15 detectives to find Mrs Ball who is described as a keen rambler.
A police helicopter and police dog handling teams have also assisted in a search of the area.
House to house inquiries have also been carried out.
Mrs Ball's blue Toyota Yaris was discovered on Monday on a path 20m from Birch Grove Road in Horsted Keynes close to Ashdown Cricket Club.
Police said the area is used by horse riders and dog walkers and want anyone who might have seen Mrs Ball, who is described as vulnerable, or the car to come forward.
She is described as 5ft 4ins tall and was wearing a green Berghaus jacket.
She is a smoker and police said she may have cigarettes, a lighter and her car keys in her possession.