German police said they were investigating after a man dressed as Adolf Hitler rode around a weekend festival in a motorbike sidecar, although he provoked more amusement than outrage.
"When people dress up as Adolf Hitler, an investigation is always necessary," a spokesman for Saxony police told news agency DPA on Monday.
The fake Fuehrer appeared at a classic motorcycle gathering in Augustusburg, near Chemnitz, and was seen in videos of the event posted online.
He sported a toothbrush moustache and was seated in the sidecar of a bike driven by a man dressed as a 1940s-era soldier, complete with World War II-style helmet.
People are heard laughing as the pair pass by and a policeman guarding the event pulls out his phone with a smile to take photos.
The officer could now face consequences for his failure to step in.
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"We would have expected our colleague to put a stop to all this without the least hesitation," the Saxony police spokesman said.
Saxony premier Michael Kretschmer also condemned the Hitler pantomime.
"Dressing up as a mass murderer is more than just bad taste," he tweeted. "This kind of behaviour is unacceptable and shouldn't be repeated."