A local news agency in Peru, Andina, has reported four men and two women were arrested for entering Machu Picchu illegally, damaging the site and leaving faeces.
Peruvian authorities found a lithic artefact from a wall in The Temple of the Sun had been pulled down.
Head of the Cusco regional unit, Wilbert Leyva, told Andina it was a "crime of destroying cultural heritage".
The Guardian has since reported that five of the accused people – reported as from Chile, France, Brazil and Argentina – are being deported.
There are about 200 Incan structures at Machu Picchu, which Unesco describes as an "outstanding religious, ceremonial, astronomical and agricultural centre".
