Two injured as building collapses on tradies in Sydney

Two people have been injured in a building collapse in Sydney.

The building on Wattle St in Ultimo caved in about 11am on Monday, causing debris to crash onto cars at a neighbouring petrol station.

Paramedics told 7NEWS.com.au they are treating two people injured during the incident, which is being treated as a possible workplace incident. Their status and extent of injuries are not yet known.

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Footage from the scene shows a ute almost completely crushed in bricks while the frame of the building has been mangled.

Two firetrucks have been dispatched to the scene as firefighters check the stability of the remaining structure.

Police are also on the scene to establish a perimeter around the site.