A local council in Northern Ireland is set to consider whether it will take action over the addition of an unapproved plaque to a memorial to those killed and injured in the Omagh bomb.

Kevin Skelton, whose wife Philomena was one of the 29 people and unborn twins killed in the 1998 blast, was responsible for adding the plaque.

The car bomb, which dissident republican group the Real IRA claimed responsibility for, was one of the worst atrocities of Northern Ireland’s troubled past and sparked outrage both locally and internationally.

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Kevin Skelton with the only picture of himself and his wife Philomena, who was killed in the Omagh bomb in 1998 (PA)

Mr Skelton afixed the bronze plaque to the bottom section of the glass memorial, which stands at the site of the bomb on the town’s Market Street, to point out that dissident republicans had been responsible for the attack.

It reads: “In memory of 29 men, women, children and unborn twins who were brutally murdered and over 300 people injured by a dissident republican terrorist car bomb on the 15th August 1998, never forgotten.”

Mr Skelton said he added the plaque because he wants the “full story” of the bomb to be known by visitors to the town and future generations.

He said he hoped it will remain at the monument, but if the plaque is removed, he would like it returned to him, adding that in those circumstances he would erect it at another location.

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A plaque which has been added to the Omagh bomb memorial on Market Street (Rebecca Black/PA)

Fermanagh and Omagh District Council said the placing of the plaque was not authorised.

At a meeting of the council on Tuesday, the matter was raised briefly by chairman Howard Thornton (Ulster Unionist Party).

Councillor Thornton told fellow members that he has asked officers to prepare a report outlining “the full facts”.

He said the report from the officers would come “in due course”, and did not invite any further comment or debate from councillors.

Mr Skelton was not present at the meeting.

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The plaque on a wall on Market Street where the Omagh bomb exploded in 1998 (Rebecca Black/PA)

The placing of the plaque follows a dispute between the then Omagh District Council and the families of those killed in the blast over the wording on the monument, which was erected ahead of the 10th anniversary of the atrocity in 2008.

A memorial garden close to the site was also created at that stage.

Some councillors objected to the words “dissident republican” being included on the monument or in the garden.

An independent mediator was appointed to help the council and families reach agreement, but some of the families were left discontented when the monument was created.

It consists of a glass monument which includes a heart.

A nearby plaque on a wall simply refers to an “act of terror”.

Mr Skelton said he wants future generations to know exactly what the memorial is for.

Omagh bombing 20th anniversary
Floral tributes left at the Omagh Bomb Memorial (Liam McBurney/PA)

He glued the plaque, which cost around £300, to the monument on December 27 in “broad daylight”, and said he has not had any negative feedback about it.

“The reason I put the plaque on it was to let the world know what happened here,” he said.

“This is the bomb site, but there is nothing here to tell you what happened – except a plaque on the wall which just says terror attack. This is telling the truth, who carried it out, nothing only the truth.

“I hope and pray that it is left alone, it is part of Omagh’s history, that it is here for generations to come as part of Omagh’s history and that no one touches it.

“It’s not meant to offend anyone, I don’t think it is offending anyone, it is just telling the truth and it should have been on years ago.

“It’s no good putting up a memorial if you don’t say what happened, and that’s why I did it.”

Mr Skelton also said he regards the plaque as his final act when it comes to the bomb – following the last service to take place at the site last summer, which marked the 20th anniversary.

Now he said he wants to focus on helping people through his organisation Families Moving On.