The conveyor belt at the Kouaoua mine. Photo: SLN
There has been an arson attack in New Caledonia on the SLN mine site in Kouaoua.
Unknown perpetrators seized several company vehicles in the night to Sunday and set them on fire.
Earlier, the conveyor belt feeding ore to the coast was again set on fire.
Police have opened an investigation.
SLN has had its operations disrupted territory-wide amid a protest movement against the sale of the Vale nickel plant.
According to SLN, this month's blockades have cost it about $US15 million.
The mayor of Noumea has called for an end to the blockades to avoid an economic disaster, which could hit all of New Caledonia.
Ten days ago, the Vale site at Goro was vandalised and remains closed.