Mayo County Council is working to find long-term accommodation for more than 90 children who have fled the conflict in Ukraine.
Almost 60 of those who made the journey, from the Chernobyl area to Ireland, travelled unaccompanied by parents or guardians.
Their trip was organised by the Mayo based Candle Of Grace charity, which works to assist those affected by the 1986 nuclear disaster in Chernobyl.
A total of 113 children and adults flew from Poland to Dublin yesterday.
Details of their journey were limited in advance of the trip, amid concerns that the busses carrying them might be targeted en route to Poland.
The Candle of Grace organisation said it was concerned after a previous aid convoy to Odessa was attacked, when information about the relief effort was shared on social media.
The absence of advance notification led to lengthy delays when the group landed at Dublin Airport yesterday.
The child and family agency, Tusla, processed their arrivals by late last evening and they continued their onward journey to Mayo by bus.
The children, aged between two and 17, are being put up in a number of hotels and B&Bs at present.
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It is expected they will stay together for a number of days before being allocated more permanent accommodation, at various locations around the county.
While in Ireland, they will be treated by a medic who has spent more than 30 years researching the impact of the nuclear disaster in Chernobyl.
Professor Yury Bandazhevsky resettled in Mayo in recent weeks after fleeing the war.
He has carried out extensive studies on exposure to high levels of radiation and now has plans to establish a new research centre in Mayo.
There are concerns that recent operations around the former nuclear plant have disturbed lands in the area, dislodging radioactive particles and releasing them into the atmosphere.
The founder of Candle of Grace, Lily Luzan, said the refugee flight was the latest in a series of efforts the charity had made since the outbreak of hostilities in Ukraine.
Many of those who fled to Ireland are said to be extremely traumatised by the events of recent weeks. She detailed how the effort to get the children to safety had been shrouded in secrecy, due to fears that the convoy would be intercepted as it travelled to the Polish border.
Ms Luzan said her concerns were heightened after a video showing aid supplies the charity sent from Ireland was circulated online two weeks ago.
Hours later, the drop-off point, at an orphanage in Odessa, was bombed, resulting in the death of one child and injuries to several others.
Earlier, Minister for Children Roderic O'Gorman said a significant number of unaccompanied minors had arrived from Ukraine since March.
He said the majority had subsequently been "linked back in" with family members in Ireland, but he emphasised the need for vigilance, regarding the risks facing those fleeing the war.
Speaking on RTÉ's Today with Claire Byrne, Minister O’Gorman said it was essential that anyone bringing people to Ireland alerted authorities about their plans.
He said it was crucial that relevant statutory agencies were notified in advance of any refugees landing in Ireland.
The minister said he recognised the desire many people had to assist Ukrainians but that it was important that steps could be taken to ensure that the Departments of Justice, Children and Social Protection were alerted, "particularly if significant numbers are coming into the country".
The Department of Children said representatives from Tusla met each of the unaccompanied children last evening to ensure appropriate care arrangements were in place for them.
They are now being further monitored by local social workers in Mayo to make sure that follow-up plans are in place for each of the children.