Detectives in Bad Homburg are looking for anyone who witnessed an attack in Weißkirchen on Saturday evening.
A 52 year old man was returning home from work in Frankfurt when he was attacked and robbed by three men.
The men are described as being approximately 1.80m tall, masked and wearing dark clothes. The police report that they hit their victim before giving him an electric shock, after which they proceeded to hit and kick him.
After they had taken the cash that he was carrying they ran off.
Anyone who saw the attack or was near the U-Bahn station in Weißkirchen at around 10.45pm is asked to call the police in Bad Homburg (Kripo) on 06172 1200.