Nurses at the Mid-Western Regional Hospital in Limerick are stopping work for four hours this morning in a protest at overcrowding.
The nurses are taking the action over what they describe as "gross overcrowding" at the hospital's accident and emergency department which is impacting on their ability to deliver satisfactory clinical care to patients.
They claim the Minister for Health and the HSE have failed to address their concerns.
The stoppage is going ahead from 8.30am after talks at the Labour Relations Commission last night failed to reach agreement.
It is the second such stoppage in eight days taken by the nurses, who are members of the Irish Nurses and Midwives Association and Siptu.