At 10.39pm, police and three Fire and Rescue NSW crews responded to a report by a passing motorist of a fire at the Wakaden Street food distribution company.

Fire fighters arrived to find smoke billowing out of the rear warehouse section and forced entry using a power-saw.

The fire was burning in a large open warehouse and spread into two large internal cool-rooms.

Fire fighters brought the blaze under control within 30 minutes using two hose lines. The fire caused extensive damage to the cool rooms and the products inside, but despite the fire reaching the roof, 70 per cent of the building was saved.

Duty Commander for Riverina 1 Rick Jones praised the efforts of the Griffith and Yenda crews highlighting their skilled use of advanced fire fighting techniques.

"Another five or 10 minutes and the whole place would have been alight, they saved hundreds of thousands of dollars," Duty Commander Jones said.

"It is an unusual building in that the cool rooms are constructed from aluminium, foam, polystyrene and material and the use of Insulated Sandwich Panels (ISP) makes the fire hard to detect and extinguish.

"Even though the fire got into the roof, the guys stopped it from spreading to the rest of the building a testament to them.

"They should all be proud of themselves, they saved the business from going to the wall."

Duty Commander Jones said it didn't appear the fire was suspicious, although further investigations would continue.

Fire investigators examined the building on Thursday morning and turned the scene over to a police guard yesterday ahead of further forensic examination.