Massive building fire in Sydney sending smoke over city

Huge flames are billowing from a building in Surry Hills in central Sydney, with plumes of smoke drifting over the city. 

It is believed at least 50 people have been evacuated from the building as the fire burns through multiple levels on Randall Street near Central Station.

The fire is sending large plumes of smoke into the air.

Fire and rescue crews are at the scene.

More to come.