Austrian police have detained a man for glorifying the Nazi regime, after he appeared in public dressed as Adolf Hitler, a police spokesman said.
It also reported that he was later spotted in a local bookstore browsing through magazines about World War Two.
One man told a local news paper: 'I have often seen this gentlemen in Braunau and wonder if this means something'.
It also reported that he went to a local bar and identified himself "Harald Hitler" and insisted on being served "Austrian mineral water".
Police have confirmed the local media reports, saying that they are "aware of this situation" and have already issued an arrest warrant for the mysterious doppelganger on suspicion of 'revival of Nazism'.
The Austrian authorities announced last October that the house in which Hitler was born is to be demolished to stop it becoming a "pilgrimage and memorial" for neo-Nazis.
An Adolf Hitler impersonator, complete with military garb and a cropped moustache, has been spotted close to the Nazi leader's birthplace prompting a police investigation.More news: Cut federal funding to Planned Parenthood
Glorifying Hitler or the Nazis is a crime in Austria.
"We received a claim by the owner".
The Austrian government has been renting the building since 1972 to control how it is used.
Last October, the Austrian authorities chose to demolish Hitler's birthplace house to stop it becoming a focal point for neo-Nazis.
The demolition would see the construction of a new building with no associations with Hitler, Interior Ministry spokesman Karl-Heinz Grundbock said at that time.
The house where Hitler was born has been at the center of a legal debate for several years.