Police have launched an urgent appeal for information about the whereabouts of a woman who was last seen getting into a van with a man.
Katie Kenyon, 33, has been reported missing after being last seen on Friday morning.
She was spotting leaving a house in Burnley, Lancashire, with a man before the pair travelled to Bolton by Bowland in the Forest of Bowland area of outstanding natural beauty together in a silver Ford Transit van, police said.
Kenyon has not been heard from since and her family are "very worried" as her disappearance is out of character, Lancashire Police said.
The force said a 50-year-old has been arrested on suspicion of kidnap and detectives are now appealing for anyone who might have seen missing Kenyon to come forward.
The 33-year-old is described as white, around 5ft 9ins, with shoulder-length blonde hair. She was last seen wearing a blue cardigan, light blue and white top, black leggings and flip flops.
A spokesman for Lancashire Police said: "Our enquiries so far suggest that at about 9.30am on Friday, April 22, a woman matching Katie’s description left an address on Todmorden Road, Burnley with a man and travelled in a silver Ford Transit registration MT57 FLC to the Bolton by Bowland area.
"She has not been seen since and we are appealing to anyone who was in that area and may have seen Katie, either in company or on her own, or who saw or has dashcam footage of a van matching the description to come forward and contact us."
Detective Chief Inspector Al Davies, from the Force Major Investigation Team, added: "Katie’s disappearance is out of character and her family are understandably very worried.
"We are doing all we can to try and find her and I would appeal to anyone who has any information, however insignificant you may think it is, to come forward and contact us.
"I would especially like to hear from anyone who was in Bolton by Bowland or the surrounding area and saw anything suspicious to get in touch.
"Did you see a woman matching Katie’s description, either alone or with a man? Did you see the silver transit van or might you have dashcam footage which shows it.
"While we have arrested someone in connection with our investigation, I am very much keeping an open mind as to what has happened and I have a team of officers and staff working hard to try and find Katie and return her to her family.
"You could help with that so please do come forward and speak to us as your information could prove crucial."