A fire which ripped through a recycling depot in Central Otago on Thursday night was started deliberately.
The Fire Service were called to Central Otago Wastebusters on Boundary Rd in Alexandra just after 8pm on Thursday and arrived to find the building "well ablaze".
A spokesman for the Fire Service said eight trucks from three different brigades attended.
Today, Detective Alan Lee confirmed that a criminal arson investigation was underway.
"The investigators have worked through a large scene and now we have located the point where the fire started, it is clear that it has been deliberately lit."