An 81-year-old woman was seriously injured in a knife attack in downtown Frankfurt.
According to previous findings, a 24-year-old attacked the senior on Friday in the B-level of the Hauptwache station, the police said.
Passers-by held the attacker until the police arrived.
The 81-year-old came to a hospital, now the criminal police are investigating.
Frankfurt / Main - The background to the crime was still unclear.
dpa