A drunken American tourist was beaten up after giving a Nazi salute in Dresden, local police say.
The 41-year-old man, who was lightly injured in the attack, was being investigated for using symbols from banned organisations after giving the salute.
Public displays of Nazi symbols like the swastika or gestures like the "Heil Hitler" salute have been banned in Germany since the end of World War II.
A conviction usually results in a fine but can carry a prison sentence of up to three years.
The incident happened on Saturday morning as the inebriated tourist left a bar in the eastern city’s Neustadt area and repeatedly gave the Hitler salute on the street.
“An unknown passerby then beat up the man and slightly injured him,” a police statement said.
The district in which this took place is known to be a liberal part of town and is a popular meeting place for students.
Police said the man who beat him up fled the scene, and that the American tourist was “severely drunk".
They are still seeking the passer-by for causing personal injury.
A week ago, two Chinese tourists were arrested for giving Nazi salutes outside the Reichstag.
They were fined almost £500 each but were allowed to leave the country with their tour group.