“I'm a junkie, need €50,” the man allegedly told one victim at a Sparkasse branch on Grundstrasse around 4 pm while threatening to make a jab with a needle.
The attack followed similar demands made by the man at a separate bank location on Rheinstrasse around 2 pm.
“In both cases the victims handed him the money and the suspect fled without harming them,” a police statement said.
Despite an immediate search that included the use of a helicopter, police have not been able to locate the man. He was described as a corpulent, dark-haired man of average height wearing jeans and a military-style cap.