RTÉ coverage of the Leinster Hurling Championship replay between Galway and Dublin was presented by Joanne Cantwell on Saturday evening.
The national broadcaster later tweeted that regular presenter Michael Lyster had been taken to hospital and was receiving treatment.
RTÉ confirms Michael Lyster taken ill & not presenting on @rte2 this weekend. Michael receiving treatment; family have requested privacy.
— RTÉ (@rte) June 6, 2015
According to the Irish Independent, it was on Friday night that the Galway man was taken to hospital.
The 61-year-old suffered a health scare in 2012 which he spoke about at length with the Irish Independent's Vincent Hogan.
Picture credit: Brendan Moran / SPORTSFILE