Three watercolors said to be painted by Adolf Hitler were set to go up for auction in Berlin at the Kloss Auction House on Thursday. But in a turn of events, Berlin police confiscated the paintings in a raid later that day on the suspicion that they are forgeries.

"The commission for art crimes is now investigating attempted fraud and document forgery," Berlin police said in a tweet.

Police spokesman Martin Halweg told the Associated Press Friday the paintings were seized from the auction house before they could be sold after police received a complaint questioning their authenticity.

Kloss Auction House published a statement Friday afternoon explaining that the works had been sold to them by "a private individual" and had been verified professionally.

The auction house had set a starting price of 4,000 euros ($4,500) on each of the watercolors, said to be painted between 1910 and 1911. Depicting tranquil landscapes, the works were signed "A. Hitler."

A detail from a watercolor of an unknown landscape attributed to former German dictator Adolf Hitler is pictured before an auction at Kloos house in Berlin, Jan. 24, 2019.(Fabrizio Bensch/Reuters) A detail from a watercolor of an unknown landscape attributed to former German dictator Adolf Hitler is pictured before an auction at Kloos house in Berlin, Jan. 24, 2019.

Hitler failed the entrance exams to the Vienna Academy of Fine Arts twice. Prior to fighting in World War I, he tried unsuccessfully to make a living as an artist, painting postcards and pictures for tourists. He eventually turned away from his artistic pursuits and led the Nazi Party, ordering the deaths of millions.

Prior to the paintings' confiscation, a spokesperson for the auction house, Heinz-Joachim Maeder, told Reuters news agency that in his view, the works have "no artistic value."

"If you walk down the Seine and see 100 artists, 80 will be better than this," Maeder told Reuters.

A watercolor of an unknown landscape attributed to former German dictator Adolf Hitler is pictured before an auction at Kloos house in Berlin, Jan. 24, 2019.(Fabrizio Bensch/Reuters) A watercolor of an unknown landscape attributed to former German dictator Adolf Hitler is pictured before an auction at Kloos house in Berlin, Jan. 24, 2019.

Thousands of Hitler’s works exist, as well as many forgeries. The pieces up for auction at Kloss had certificates of authenticity signed between 2017 and 2018.

Hitler's works have fetched high prices at auction before, despite the fact that few auction houses want to be seen turning a profit from the genocidal leader. In 2015, Weidler Auction House in Nuremberg sold 15 of his paintings for a total of 391,000 euros ($438,100).

Despite never having been a successful artist himself, Hitler imposed strict controls on the art allowed under the Nazi Party. The regime used the term "degenerate art" to describe works that purported modernist tendencies popular at the time -- many painted by Jews.

Targeting well-known artists of the day such as Paul Klee and Max Beckmann, the Nazis removed more than 20,000 works deemed "degenerate" from state-owned museums.