A tonne of ivory worth around €4.5 million ($5.1 million), was crushed in Rome on Thursday, to mark World Wildlife Day as Italian authorities stamp down on illegal ivory trafficking.

The event was organised by the U.S. organisation Elephant Action League in conjunction with the Italian Ministry of Environment and the Italian Forest Police. According to the organisation, the main mission of the event was “to give a strong signal to the world: Italy will not tolerate ivory trafficking” as well as “illegal trade of ivory and other wildlife products such as rhino horn and timber.”