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. Camera Icon Two people have been injured after a building collapsed in Ultimo, Sydney, on Monday morning. Credit: 7NEWSFootage from the scene shows a ute almost completely crushed in bricks while the frame of the building has been mangled. The public have been urged to keep clear of the site as emergency services now begin work to safely enter the building.