Allied Irish Bank (AIB) customers have been having trouble accessing their accounts on a number of devices.

The bank has confirmed that its services have been affected by technical issues.

Earlier today is online, tablet, and mobile banking services all experienced outages. The latest update from AIB says that only its mobile banking service is still down.

Our Tablet Banking service is now available, we appreciate your patience while we resolve the issue on the Mobile Banking service.

— AIB Customer Support (@AskAIB) July 21, 2016

AIB says that it is working to resolve this issue - and it has apologised for any inconvenience that it has caused to customers.

"We currently have normal levels of customer usage on the AIB mobile banking app, but we are aware that some customers are still experiencing difficulty accessing banking via the app. These customers can access internet banking from their mobile phones. Internet banking and tablet banking is available," the bank said in a statement to Newstalk.