Troubled rocker Pete Doherty has apologized to fans after he was booed offstage for singing a Nazi anthem at a German music festival on Saturday.

The Babyshambles front man was performing at Munich's on3 when he infuriated concertgoers by singing Deutschland Uber Alles, a section of the country's national anthem that once was used for German propaganda under Nazi rule. He was subjected to loud booing before festival organizers led him from the stage.

The controversial verse has been prohibited since World War II due to its Nazi association - but a spokesperson for the rocker insists Doherty was "unaware" of the mistake he'd made.

The rep tells Sky News, "(Doherty) wanted to celebrate his appearance in Munich by assimilating and integrating with the crowd, something he tries do wherever he goes. He was unaware of the controversy surrounding the German national anthem and he deeply apologizes if he has caused any offense."

"Peter himself is from Jewish descent and has fought against racism and fascism with numerous organizations including Love Music Hate Racism. This is a subject he feels very strongly about."

Bavarian broadcasters Bayerischer Rundfunk, who were airing the concert live, pulled the show from the airwaves moments after Doherty began the track.

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(This news article provided by World Entertainment News Network)