Bank of Ireland (LSE:BKIR) said it had sorted out a glitch in a banking app that had seen people queuing outside ATMs for ‘free money’.
Social media posts about the glitch, which allowed people to withdraw €1,000 even if they had no or little money in their account, sparked the queues at ATMs.
In some places, Gardai officers were stationed outside cash machines to stop the flow of people turning up to withdraw cash.
Due to a glitch, people with accounts linked with a digital banking app, such as Revolut, could withdraw the money.
Pictures were posted of queues at some ATMs as news started trending on Elon Musk’s social media platform X, formerly known as Twitter.
In a statement, the bank said: "Yesterday a technical issue impacted a number of Bank of Ireland (LSE:BKIR)'s services. Our teams restored these services overnight and all services are available to customers this morning."
"We are aware that the technical issue meant some customers were able to withdraw or transfer funds above their normal limits. These transfers and withdrawals will be applied to customers' accounts today."
Michael McGrath, Ireland's finance minister, asked the central bank to establish a full account of what happened and whether any further steps are required to reduce the risk of such outages across the sector.
London-based challenger bank Revolut is hugely popular in Ireland and said earlier this year that it had more than two million customers in the country.