Two air conditioning units bound for Wellington Hospital to increase capacity for Covid-19 patients have been damaged in a suspicious fire over the weekend.
Police were advised shortly before midnight on Sunday of a truck-and-trailer fire in Ōtaki.
The truck was parked at a property on State Highway 1, a police spokesperson said.
"The fire is being treated as suspicious at this stage, police are back at the scene this morning, and continuing to make further inquiries."