A 35-year-old man is said to have been robbed by two men at Essen main station after allegedly feigning sexual interest from a woman.
The strangers injured his forearm with a broken glass bottle, the federal police reported on Tuesday.
The woman spoke to him first on Sunday evening and wanted "closer contact", as the police report said.
Eat - you went a bit.
Then the unknown men showed up, attacked the 35-year-old with the bottle and stole his backpack and cell phone.
The trio then fled.
According to the information, federal police officers initiated criminal proceedings for serious robbery and asked for evidence.
dpa