The 16-year-old approached the victim as she waited for her train at about 00:50 on Thursday morning, according to CCTV.
The footage shows the boy reaching into the woman’s handbag as she stands on the platform.
A 16-year-old has been arrested after a woman was pushed on to train tracks in Germany
The 34-year-old cries out for help, but the teen is alleged to have pushed her chest, forcing her backwards from the platform on to the tracks.
The woman had to be rescued by the railway station’s security team as she lay unconscious on the tracks – by the time they had arrived the suspect had fled the scene.
The victim was knocked unconscious and required hospital treatment for her injuries
Police say no trains had been approaching the station at the time of the incident.
It’s understood the boy had been detained for another assault on a woman in Hamburg a few hours before, but made-off from the police station where he was being held.
A 16-year-old Moroccan boy has been arrested
He was eventually rearrested in the early hours on Thursday when he was spotted by officers on patrol in a nearby street.
The case is now being looked into by the town’s criminal investigation service.