At about 6:00am on Sunday 23 August 2015 a vehicle was travelling along North West Coastal Highway, Geraldton.
A limestone block was thrown towards the moving vehicle from the overpass on Durlacher Street. The vehicle sustained significant damage to the underside as it struck the block.
The driver did not sustain any injuries and did not witness any persons of interest.
Police would like to speak with anyone who was in the area around the time of the incident who may have seen the incident or anyone acting suspiciously. Anyone with any information is asked to call Geraldton Police Station on 9923 4555.