Customs officials also believe he attempted to smuggle out another 425kg of silver.

BBC: German man caught 'smuggling' gold at Greek airport

They say he intended to smuggle them out of the country.

BBC: Michael Campbell not in Real IRA, Lithuania court hears

We found that the same infrastructure that is used to smuggle weapons in and out of Iraq is also used to smuggle antiquities.

CNN: Opinion: Illegal antiquities trade funds terrorism

Take the case of Yektan Turkyilmaz, an internationally acclaimed Turkish scholar who was arrested in Armenia on June 17th on charges of seeking to smuggle antique books out of the country.

ECONOMIST: Times are tough for outspoken scholars

Then, with the help of a pulley, they smuggle items in and out.

BBC: 'Safe passage' for wildlife traffickers