Mental health services continue to face disruption around the country as the Psychiatric Nurses Association continues its overtime ban.
A PNA spokesperson said there had been issues in Galway and in St Itas in Portrane, Co Dublin, where night staff could not come off shift when their shifts ended.
The spokesperson added that a number community services were also affected.
At a number of mental health organisations, managers were redeployed to fill staffing gaps.
The PNA Officer Board will meet on Monday to review the duration.
The PNA's 6,000 nurse members will have further overtime bans on 5, 6 and 7 February, escalating to a three-day strike on 12, 13 and 14 February when the 37,000 members of the INMO will also be on strike.
The INMO executive will meet tomorrow to fix further strike dates over and above the six dates already scheduled.
They may also "deepen" their industrial action by exempting fewer areas - which could result in more services being closed.
However, the union stressed that life-saving cover would not be affected.