Northen Territory Fire and Rescue Service (NTFRS) responded to a large grass fire in Humpty Doo yesterday afternoon.

Around 2:50pm, Joint Emergency Services Communication Centre received repots of a large grass fire on Trippe Road, Humpty Doo.

A short time later, NTFRS members arrived on the fire ground and commenced a response.

Twelve NTFRS career and 4 Volunteer firefighters attended with 12 appliances including Grassfire Units, as well as 4 waterbombers, 1 helicopter and 5 appliances from Bushfires NT.

Multiple inoperable vehicles and an uninhabited structure were affected by the blaze.

Initial reports indicate that the fire was not suspicious, and it ignited from a backfiring exhaust.

Investigations are ongoing.