Customers at one of Australia’s big four banks have been affected by an outage, leaving them unable to access online banking services.

Westpac acknowledged on social media that some customers were experiencing issues accessing the app, online banking, payID and Osko payments on Tuesday.

The systems were still down at 11.45pm Tuesday.

“Our teams are continuing to work on getting our impacted services back up and running,” a spokesman said in a post.

“We’re sorry for the ongoing disruption – we know how important it is to be able to access your banking when you need it.”

The bank said another update about the outage would be issued at 6am Wednesday.

“Call centre wait times are longer than usual,” a spokesman said in an earlier post.

Westpac apologised for the inconvenience and assured customers their teams were working to restore the affected services as quickly as possible.

“We’re sorry for the inconvenience and will provide further updates here,” a spokesman said.

Down Detector showed thousands of Westpac customers started experiencing problems early on Tuesday afternoon and had continued for several hours.

Customers flooded social media, saying the issue had been ongoing for several hours and they were unable to pay direct debits or purchase items at the shops.

“(Once) again stuck at the checkout with out a way to access my own money,” one person commented.

“My daughter couldn’t pay for fuel for the car.”

Westpac has been contacted for comment.

Read related topics:Westpac