Police say they'll be checking CCTV to trace teenagers who abused cruise ship passengers.
Officers took to social media saying port security at the Sea Terminal are reporting rising levels of unruly and rude behaviour there.
They say offensive language and anti-social behaviour towards visitors won't be tolerated, and are urging parents to check whether their youngsters have been involved.
And they add they're now reviewing CCTV to identify those responsible.
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