Arnold Schwarzenegger rides into trouble on his bike in Munich, Germany

Former Californian state governor Arnold Schwarzenegger poses with police officer Stefan Schmitt for a selfie in the main train station in Munich, Germany. Photo / AP

Arnold Schwarzenegger found himself on the wrong side of the law this week when he was stopped by German police at a Munich train station.

The Terminator, 69, was stopped by police officer Stefan Schmitt on Friday after he was spotted riding his bike on the train platform along with a bodyguard.

Schwarzenegger immediately got off the bike once instructed, apologised and then told the officer he was having trouble walking.

Police said in a statement that Schwarzenegger spoke with Mr Schmitt and was then allowed to exit the train station by walking his bike.

Professional bodybuilder Arnold Schwarzenegger posing at the top of his form in October 1976. Photo / Getty

Schwarzenegger, the Governor of California from 2003-2011, is set to help out fellow Republican Donald Trump when he takes over as host of Celebrity Apprentice, which is set to air in 2017.