A big screen in Cardiff city centre has been hacked by pranksters who displayed offensive images including swastikas and references to Sharia law.
Screengrabs of the photos posted on the thread "Politically Incorrect" on 4Chan were shared on Twitter by /pol/ News Forever - an account described as "politically incorrect - and always right".
Pictured: The hoax Islamic "warning", which read: "This is a Sharia controlled zone". No alcohol. No gambling.
The giant billboard was located at a popular shopping destination on Queen Street, above a Superdrug store.
The billboard also showed a cartoon drawing of President Donald Trump with a face of a frog and a sinister "Big Brother Is Watching You" sign from George Orwell's dystopian novel 1984.
Everything can be hacked if you try hard enough, even those electronic displays you see dotted around the world.
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Outdoor advertising company blowUP media said it was looking into the incident.
The company released a statement saying: 'Our team are trying to find out what happened'.
A South Wales Police spokesman has said the force is investigating the incident after receiving a number of calls from passers-by.
The screen, which is run by BlowUpMedia, has since been switched off, and presumably will be getting a security overhaul.
"On Tuesday evening South Wales Police received a number of calls relating to concerns regarding messages being displayed on the screens in Queen Street, Cardiff", the coppers told Wales Today.