CHILLING images have been released of a young mum just an hour before she was killed and dumped in a Nazi bunker.
Bianca S., 26, is feared to have been abducted and stabbed after she was last seen at a train station in Oranienburg .
Police have now released CCTV images of her pushing her bike along the platform at 1pm last Thursday.
They said her last words were to a friend she ran into at the station, in which she talked about taking a forest route which went by the bunker.
“Oh, I’ll take the detour via the bunker, there is more shade on the route. See you soon,” she said, Bild reports.
Police spokeswoman Dörte Röhrs: “We hope that witnesses in the forest, on the way and along the Lehnitzsee may remember the deceased.”
She added that cops want to know if she was travelling alone or with another person.
A friend who saw her at noon said she was on the way to see a doctor, but she then failed to show up to a team meeting at work at 2pm.
She also failed to collect her five-year-old son from daycare that afternoon, sparking appeals from worried authorities.
Then at 10pm on Monday, workmen found her body in a corridor at a former SS radio station at Karo Ass, four miles outside the town.
The moss-covered bunker dating from World War Two is hidden deep in the forest, and is accessed through a muddy trench under a gap in the concrete wall.
Early investigations indicate the victim was stabbed, according to reports.
Detectives later ruled out rape, according to RTL, and the motive remains a mystery.
On Wednesday police found Bianca’s bicycle in undergrowth less than 100 yards from the bunker.
“We have no direct evidence of another crime scene,” said a spokesman for the public prosecutor’s office.
Investigators said it is likely Bianca was killed in or near the bunker.
Police asked the public to report any strange goings-on nearby.
The force said: “We have not yet been able to identify a suspect.”
Bianca’s mother stepped in to collect her grandson from daycare after the young mum failed to arrive as usual at 4pm on Thursday.
Her family said her disappearance was out of character and she was officially declared missing on Saturday.
Police used 14 sniffer dogs to scour the area but found no trace until the grisly discovery in the bunker.
Oranienburg, around 22 miles north of Berlin, became the centre of the Nazis’ nuclear project with a uranium enrichment facility nearby.
The US Air Force destroyed the nuclear plant in 1945 to stop it falling into Stalin’s hands.
Oranienburg also housed arms and aircraft factories and one of the first concentration camps, which was set up in 1933.