A massive blaze at an Auckland industrial site was probably caused by arson.

from nzherald

More than 120 firefighters and 30 appliances attended Friday night's fire at the old Southdown freezing works in Penrose, the second in 18 months. Yesterday more than 80 firefighters were on duty as the fire continued to burn.
"The preliminary view is that it was most likely arson," said John Sax, the multi-millionaire developer who owns the site.
"It could have started over a number of floors, and there's virtually no way for that to have occurred, there was nothing of any electrical nature there."
Sax, founder of the For The Sake of Our Children Trust, said the complex was fenced and under constant security. It appeared an accelerant was used. "It's not easy to get into that area so someone would have had to go to some degree of effort to get into that sector."