Authorities are at the scene after a building collapsed in Sydney's Ultimo, injuring seven people. (Damian Shaw/AAP PHOTOS)Authorities are at the scene after a building collapsed in Sydney's Ultimo, injuring seven people. (Damian Shaw/AAP PHOTOS) Credit: AAPTwo people have been pulled from debris after the sudden collapse of a building under construction in an inner-city suburb. The men, aged in their 60s, remained in serious but stable condition after being transported to two separate hospitals, Ambulance NSW said on Monday. Urban search-and-rescue firefighters are at the scene, with police clearing the area and evacuating workers from the construction site.