Third-party vendor FIS blamed a local power loss and hardware failure for the issue, which Bank of Oklahoma said affected more than two dozen financial institutions.

An outage affecting Capital One customers dragged into its second day Friday, further preventing some customers from accessing deposits, payments and transfers. In an afternoon statement, the bank said it was still restoring systems that had been taken offline due to a technical issue with a third-party vendor.

That vendor, Fidelity Information Services, released a statement late Thursday blaming a local power outage affecting one of its data centers. Capitol One said deposits and payment processing for some consumers, small businesses and commercial banks were affected by the outage.