Overview
- The former Irish middle‑distance runner was found dead in Montreal on Tuesday and his death has been confirmed by clubs and Athletics Ireland.
- Authorities and family have not published an official cause of death and coverage describes the discovery as sudden and unexpected with further details still pending.
- Ó Lionáird reached a 2011 World Championships 1500m final, represented Ireland at the London 2012 Olympics, and won bronze at the 2013 European Indoor Championships.
- His career was repeatedly disrupted by injury, leading to an initial retirement in 2016, a brief comeback attempt during the COVID period, and a final retirement in 2020.
- Former clubs West Muskerry AC and Leevale AC, coaches and teammates have paid tribute, and the athletics community is watching for formal statements or an investigation into the circumstances.