Three unit blocks evacuated in Hornsby after crane collapses on neighbouring construction site

Three unit blocks have been evacuated after a crane collapsed at a construction site in Sydney's north.

The crane fell onto a four-level building under construction at the site on Sherbrook Road in Hornsby this morning. 

Around 70 residents were forced to leave their homes as a precaution. 

Fire and Rescue NSW crews are at the site and are using other cranes to remove the wreckage. 

Engineers are also at the scene. 

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