AIB customers were left frustrated on Thursday afternoon after many were left unable to access the bank's app.
Dozens of people took to social media to voice their dissatisfaction that they could not access their accounts via their smartphones.
AIB said in a statement on Twitter: "AIB Internet Banking & the Mobile Banking app are currently experiencing technical difficulties. The issue is also affecting card eCommerce transactions that require Strong Customer Authentication. We are working to resolve the matter and apologise for any inconvenience caused."
