Wells Fargo website slowdown attributed to cyber attack

Wells Fargo said the intermittent slow-downs on its website Tuesday were the result of unusually high traffic volumes, which the bank believes to be part of a cyber attack.

It's the latest U.S. bank to be hit by the so-called "denial of service" attacks. TD Bank and KeyBank confirmed to BankInfoSecurity that they were hit by the cyberattacks last week. Bank of America, BB&T, JPMorgan Chase, Citigroup and PNC have also been plagued by on-again, off-again website slowdowns.

Denial of service attacks attempt to keep legitimate customers from accessing sites by flooding web servers with requests. Wells Fargo's website problems appear to have begun Tuesday morning.

"The vast majority of customers are not impacted and customer information is safe," spokesman Josh Dunn said in an emailed statement. "We apologize to our customers for any inconvenience."