A message on the home page said the site was temporarily unavailable. Some visitors who tried to sign onto their accounts were greeted with the message that the site was "operating slower than usual" and that the bank was working to restore service.
A company spokeswoman said the problems began around 9:15 a.m. Friday, but that customers can still bank via text message and at ATMs. She said problems weren't the result of hacking.
The outage came a day after the bank said it would start charging a $5 monthly fee for debit card purchases.
