The Irish Air Corps has come to the assistance of a pilgrim climbing Croagh Patrick on Reek Sunday.
A woman in her mid forties is believed to have suffered a minor heart issue and was airlifted to Mayo General Hospital earlier.
Another climber was sent to hospital as a precaution, after showing signs of exhaustion.
It is reported that so far today, 19 pilgrims who are climbing the mountain, have been treated for minor injuries.
Mountain Rescue Ireland, the Irish Air Corps and the Gardai are among those overseeing safety.