LATEST: A 71-year-old Flowerdale man has been arrested and interviewed by police over a large grassfire north of Melbourne.

Fire crews are still working to bring the blaze under control, but there is no emergency warning in place.

The fire is believed to have started in the Spring Valley Road area at Flowerdale on Tuesday afternoon and spread into bushland.

The man has been released, pending further enquiries, and the investigation remains ongoing.

Police and CFA remain on scene and are currently working to keep the fire under control.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or online at www.crimestoppersvic.com.au.

• GET THE LATEST EMERGENCY UPDATES HERE

Image: 9News