The grandparents of a missing teenager have offered a reward for information leading to her safe return.
Police have released CCTV from Ipswich Station
Peter and Wendy Clackett offered the "substantial sum of thousands of pounds", in an appeal for help to find Natasha Coombs, made with Essex Police.
Their 17-year-old granddaughter has not been seen since 27 July when she went by train from Ipswich, Suffolk, to her home in Dovercourt, Essex.
There have been no confirmed sightings of her since she was seen on CCTV then.
The CCTV images of Natasha standing at Ipswich railway station shortly before the 2242 BST train towards Manningtree have been released by Essex Police.
She had been in Ipswich for a meal with friends in Cardinal Park, and had rang her parents at about 2240 BST to say she was on her way home.
Natasha was described by her grandfather as a happy girl who had been looking forward to going on holiday to Canada.
Natasha is white, 5ft 3in (160cm) and slim. She has brown hair with highlights and at the time of her disappearance was wearing a purple, sequinned top, a multi-coloured ra-ra skirt and a white jacket.
She was also carrying a black, furry handbag.
Mr Clackett, 62, said the money put forward was from he and his wife's joint savings.
"If somebody is holding her, they may think it's time to turn her over," he said.
"At first I thought someone had abducted her from Manningtree, but I have since been told the chances of that happening are about a million to one. I just don't know what has happened.
"We would never imagine her doing anything like this knowingly. We just feel sick."
Natasha Coombs went missing on 27 July
Essex Police have said while abduction can not be ruled out, Natasha's disappearance was being treated as a missing persons inquiry.
Ch Insp Steve Robinson, of Essex Police, said officers believed Natasha had got off the train at Manningtree and "intensive searches" had been taking place in the area.
"We've taken detailed statements from friends and family and that hasn't given us any significant leads.
"We know she was looking forward to going out on that Friday night.
"We know at some point in the evening she became upset, the suggestion is she became upset about the situation with her boyfriend."
Police are keen to trace three suited men who were on the train Natasha is thought to have been on, who may hold information about when she got off the train.