Mandurah Forum shoppers were lucky to escape unscathed after two teenage boys started throwing lead fishing sinkers at them while they sat in the centre.
About 4.40pm on January 9, two local women, who wish not to be named, were enjoying a drink at Coffee Club within the Pinjarra Road shopping centre when they and nearby diners were targeted.
Allegedly aged between 10-12, the boys stood at the top of escalators at the centre to throw the items.
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One woman said she was shocked by the behaviour of teenagers and reported the incident to local police.
A Mandurah Forum spokeswoman said the centre was assisting police with the incident.
The safety of our customers, retailers, team and the wider community is our priority, she told the Mandurah Mail.
If you have any information about this incident make a report online at crimestopperswa.com.au or call Crime Stoppers on 1800 333 000.