MORE than 400 gardai and 1,200 security team members will be on patrol at Gun's 'N' Roses' sold-out Irish gig this weekend.

The Paradise City hitmakers will perform at Slane Castle on Saturday - more than 25 years since their first gig there.

3 Slash will entertain fans at the gig Credit: Getty Images

The Garda announcement comes amid increased tension around security at concerts after 22 people were killed and 59 were injured in the brutal attack on Manchester Arena last night following an Ariana Grande concert.

A garda spokesman said: "An Garda Siochana and MCD update regarding Slane Castle concert on Saturday.

3 The rockers will take to the stage at Slane Castle Credit: News Group Newspapers Ltd

"An Garda Siochana will have over 400 members on duty, including specialist units, who will be supported by an additional 1,200 security/stewards provided by licensed security companies together with a full complement of doctors and medical teams, including an on-site hospital along with five first aid posts.

"The Event Control Management Team overseeing this event have over 25 years experience within their fields of expertise.

"Please co-operate fully with gardai and stewards and follow any loudspeaker announcements as this will help ensure the safety and enjoyment for all concerned."

Gardai are also asking concert-goers to check out the list of banned items before heading to the show.

Some of the prohibited items include backpacks, waistpacks, fire works, flares, air horns and aerosols.

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3 Ariana Grande's concert was coming to an end as a suicide bomb was detonated in the lobby of the Manchester Arena Credit: Instagram/Ariana Grande

A 23-year-old man has been arrested in connection with the Manchester attack, which is the worst terrorist incident to hit Britain since the July 7 atrocities.

The arrest was announced moments after UK Prime Minister Theresa May denounced the "appalling sickening cowardice" of the lone suicide bomber who detonated a homemade device in the foyer of the Manchester Arena just as thousands of young people were leaving.