WXYZ reports that Fifth Third Bank's website was attacked on Tuesday.
Fifth Third has three branches in Royal Oak.
According to the report, the hackers did not gain access to customer data. The attack denied service to customers, by flooding the site with traffic.
On Tuesday, the bank posted the following message on its Facebook page:
"We're actively monitoring and assessing delays on 53.com. This slowdown has not impacted customer accounts. We are working to restore online connectivity as soon as possible and will provide updates when available."
Clarification: This article has been changed to reflect that the site was attacked, but not "hacked