Customers from one of Australia’s biggest banks are being locked out of internet banking.

ING Australia confirmed in a post to X that customers had reported issues with the banking app and website on Wednesday morning.

“We are aware that some customers are currently experiencing issues accessing the ING app and website,” the post read.

“Our teams are investigating this issue and we will provide further updates shortly.

“We are extremely sorry to any customers who have been impacted.”

Custoemrs first began reporting issues with DownDetector at 7.30am.

The outage comes just four weeks after customers were hit with another outage.

ING Australia customers first reported being unable to access the website or banking app about 9am on Wednesday, October 30.

At its peak, more than 2300 people reported issues accessing ING Australia banking services.