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A big screen in Cardiff’s main shopping street was reportedly hacked with images of swastikas and messages about ‘Shariah’ appearing.

The giant billboard in Queen Street was allegedly hacked on Tuesday night by a group who claimed on social media that they “had a little fun”.

A poster on the thread Politically Incorrect, on internet site 4chan, wrote on Twitter: “Some Anons from /pol/ were able to hack into a billboard in Cardiff, Wales.

“As you can see, they had a little fun.”

(Image: @polNewsForever)

Images of a swastika and a message that read “Warning. This is a Shariah controlled zone. No alcohol. No gambling. No porn” were projected onto the board above the Superdrug store in the busy street in the heart of the capital – just as thousands of children are off school during the summer holidays.

There were also images of memes and a poster which read “Big Brother is watching you”, according to the social media account.

(Image: @RTBiscuit)

A South Wales Police spokesman said they were investigating the incident after receiving a number of calls from concerned bypassers.

In a statement they said: “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.

(Image: @polNewsForever)

“We alerted the city council and will investigate any crimes which may have been committed.”

The billboard is operated by blowUP media, who have been contacted for comment.

A spokesman Cardiff council said: “The council has contacted the company that own and operate the advertising screen. The screen was switched off at midnight on Tuesday night.”