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Police say one man has been killed and two people injured in a knife attack on a train in the northern German city of Flensburg.

Federal police said in a statement the incident took place Wednesday at around 7 p.m. local time.

They said the details of the attack were not clear yet, but that one of the injured was a 22-year-old female police officer. The statement said she appeared to have used her pistol, suggesting she may have killed the man.

German daily Bild reported that following a dispute, one man attacked another man with a knife and then a police officer who was called to intervene.

The German news agency dpa reported the Flensburg main train station had been evacuated and service to Flensburg had been interrupted temporarily.