Customers of Wells Fargo, the fourth largest bank in the US by assets, are complaining of missing direct deposit payments and incorrect balances.

The bank has acknowledged the reports which are affecting "some customers," and is chalking it up to a potential "technical issue."

"We are working quickly on a resolution and apologize for the inconvenience. Customers' accounts continue to be secure," the company added.

According to Downdetector, a spike in reported Wells Fargo outages began just after 5 a.m.