Police are investigating a fire at a South Burnie premises overnight.

About 9pm Tasmania Fire Service and police were called to Massy-Greene Drive where a large log pile was on fire.

The fire has since been determined as being deliberately-lit, with damage estimated at $20,000.

Anyone with information about the fire should contact Western CIB on 131 444 or Crime Stoppers anonymously via crimestopperstas.com.au