Causes of Davenport six-story construction collapse still under investigation. Iowa firefighters and emergency services have managed to rescue eight people alive.

So far, they have no reports of people trapped inside, although the area is still being inspected with search dogs. Officials have warned that the structure is not stable and poses a risk to emergency services.The collapse of the building, on Sunday afternoon, caused multiple gas and water leaks that complicated the rescue work. Structural engineers are currently studying the best way to proceed in a delicate recovery operation.