A brave great-grandfather from Co Cork took on three armed robbers before giving them a kick out the door when they attempted to steal from his local bookies.

Three would-be thieves armed with hammers were thwarted in their endeavor to rob a bookmakers in Cork over the weekend by an 84-year-old great-grandfather.

In CCTV footage released on Reddit, Denis O'Connor can be seen taking on the hooded robbers after they smashed into the bookies and jumped the counter, intimidating the shop manager Tim Murphy.

“I didn't really think about it - I just went for it," O’Connor told the Irish Independent.

"When I saw them confronting him (Tim), I just acted."

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As the robbers, thought to be young men in their teens or early twenties, run for the manager, O’Connor attacks them from behind, rushing them from the shop with a kick.

"He wouldn't stand by while anyone was in trouble - he's an absolute gentleman. It was typical of him," one friend said of O’Connor.

Gardaí (Irish police) are now reviewing the CCTV footage and have appealed for anyone who saw a black saloon vehicle, either an Audi A4 or VW Passat, in the area at the time to contact them.

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Great-grandfather Denis O'Connor jumped into action when three hooded, would-be robbers entered the premises and jumped towards the shop manager wielding hammers.