A person was slightly injured in a knife fight between two homeless people outside Dusseldorf airport on Tuesday, police said.
A spokesperson for Dusseldorf police said a man had fled the scene and was being sought.
A stabbing victim was taken to hospital, the federal police spokeswoman said, confirming a report by German magazine Focus.
Surveillance footage showed two men walking toward an airport parking lot at 12.16 pm local time (1016 GMT), at which point the fight occurred, a spokeswoman for federal police said.