Eighteen people were injured in a knife attack in Hamburg station on Friday evening, Germany's Bild newspaper reported, and local police confirmed they had arrested the suspected assailant.
Four victims are in critical condition and six others are seriously injured, Bild reported, saying the motive for the attack was unclear.
Police said the suspected assailant was a 39-year old woman who allowed herself to be arrested without resistance.
"So far we have no evidence that the woman could have acted with political motivation," said Hamburg police spokesperson Florian Abbenseth. "Rather, we have findings on the basis of which we are now investigating in particular whether she may have been in a state of mental distress."
German Chancellor Friedrich Merz said in a post on social media platform X that the news from Hamburg was "shocking."
"My thoughts are with the victims and their families," he said.

Wave of bomb threats afflict European flights for third time this week
Jay Rockefeller, heir to famed dynasty and former US Senator, dies at 89
At least two children killed in bus crash in eastern France, authorities say
Vance repudiates Iran war after US electoral defeat
Malaysia ex-PM Najib Razak set for house arrest after party pays fine to leave jail
