Ambulance crew members from the Psychiatric Nurses Association, have confirmed that they are to hold two further days of strike action.
Although no official date has been set for the strike action, the PNA say they are holding the action as the HSE has refused to recognise the PNA NASRA Union.
The strike action comes after there were stoppages last week.
It is believed that the HSE are unwilling to recognise the Union as it already recognises the National Ambulance Service, and therefore by recognising other unions could harm good working relations.