Mountbatten - CIA or IRA?

Was it the IRA or the CIA or both?

M.P. Enoch Powell suggested that the CIA were involved in the murder of Earl Mountbatten of Burma in August 1979..

https://wikispooks.com › wiki › Document:The_CIA_an...

30 Sept 2018 — "The Mountbatten murder was a high-level 'job' not unconnected with the nuclear strategy of the United States" (Guardian 9th January 1984) ...

EXCLUSIVEI masterminded the plot to blow up Lord Mountbatten: Ex-IRA commander sensationally confesses to being behind the assassination of King Charles's beloved great-uncle who was murdered aged 79 during a holiday at his summer home in Ireland

I masterminded the plot to blow up Lord Mountbatten