Arnold Schwarzenegger has been detained at an airport while travelling.

Arnold Schwarzenegger was detained at Munich airport (Picture: Getty)

The Terminator actor flew into Germany from LA, but is thought to have found himself held by customs officers in Munich, with officials inspecting his luggage.

According to multiple outlets, they found a luxury Audemars Piguet watch in the 76-year-old’s suitcase, sparking an investigation.

BILD has since obtained a photo showing Arnie looking at the camera and holding a package, while being questioned by officials.

He was also reportedly forced to fork out a €35,000 fine before leaving.

Arnie was on his way to a charity auction in Austria (Picture: PA)

Customs spokesperson Thomas Meister told the outlet that ‘criminal tax proceedings’ had been initiated against the Hollywood icon.

‘We have initiated criminal tax proceedings. The watch should have been registered because it is an import,’ he said.

Insiders shed light on the situation to the New York Post, describing it as a ‘comedy of errors’ that led to Arnie being detained for nearly three hours before he was taken to different cash points so that he could pay his fine.

‘He was never asked to fill out a declaration form and he answered every question from customs officers honestly,’ they said.

Insiders compared the situation to a ‘comedy of errors’ (Picture: Getty)

‘He cooperated at every step even though it was an incompetent shakedown, a total comedy of errors that would make a very funny cop movie.

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‘Arnold agreed to pre-pay potential taxes on the watch and the officers failed to use a credit card machine for an hour until they gave up.’

Arnie was making the journey to attend a charity auction in Austria when he was stopped.

He had reportedly taken the valuable Audemars Piguet watch from his own collection so that it could be auctioned off at the event.

Arnie was pictured being questioned by officers (Picture: Getty)

Audemars Piguet is known as one of the ‘big three’ watchmaking companies, with prices starting at around $17,000 and rising to well over $100,000.

It is not clear exactly which model Arnie was travelling with, and he has not spoken publicly about the incident.

The brand partnered with the action hero in 2011 to design the Arnold Schwarzenegger The Legacy Royal Oak Offshore timepiece, with 1,500 going into production.