Firefighters are cleaning up after a massive fire broke out at an industrial estate in Sydney's north-west early this morning.
At least four units at the Dural Business Centre, on Old Northern Road, caught fire just before 2:30am.
Around 100 firefighters were at the fire at its peak and residents living nearby were evacuated as thick black smoke from burning tyres rose into the air.
But fire crews managed to stop the fire spreading to a nearby service station.
Investigators are now trying to determine the cause of the fire.
No-one was injured in the blaze.