ABOUT 15 young people were brawling at Hungry Jack’s, Mandurah last night.
A report to police at 7.30pm said two groups of youths were fighting inside the fast food restaurant.
One group went outside and threw rocks, damaging four windows.
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One female was hit, but medical assistance was not required.
No one was arrested but police are investigating.
Anyone who witnessed the incident can call Crime Stoppers on 1800 333 000.