Liveline host Joe Duffy has revealed in the new issue of the RTÉ Guide that he is writing a crime novel.

Speaking to the RTÉ Guide's Donal O'Donoghue, the RTÉ Radio 1 presenter said: "The working title is Fire in the City and it revolves around a major crime planned in Dublin.

"I have written about 10,000 words. I was re-reading it last night and, Donal, it would be a crime if it was ever published. Hahaha!"

Duffy is already the author of a number of non-fiction books, including Children of the Rising: The Untold Story of the Young Lives Lost During Easter 1916 and Children of the Troubles: The Untold Story of the Children Killed in the Northern Ireland Conflict.

The new issue of the RTÉ Guide is on sale now.

Liveline: Call Back is on RTÉ One on Thursdays at 7:00pm.