Garda sources confirmed the interviews took place, though efforts to secure a comment from the men named by Mr Quinn – Liam McCaffrey and John McCartin – were not successful.

Businessman Seán Quinn has said his home was searched by gardaí today, but that he did not know why.

Seán Quinn, one-time billionaire businessman, has said he knew the identities of people responsible for carrying out arson attacks on his former companies which caused substantial damage.

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