Updated at 3:45 a.m. ET on February 2
NEW YORK Bank of America (BAC) said late Friday that its online banking service was restored, recovering from an outage that left customers unable to access their accounts for most of the day.
A person familiar with the matter said an internal systems issue had caused the crash.
Angry customers took to Twitter during the day to say that they were frustrated, trying to do their banking on the first day of the month.
Customers of another bank, BBVA Compass, also hit social networks on Friday to complain about problems accessing their accounts online.
The bank responded on Facebook (FB), telling customers that it was working to resolve system issues affecting direct deposits, such as payroll and Social Security checks, online banking and phone-banking access.
The lender announced a few hours later that the problems had been resolved.
Spokesman Thaddeus Herrick did not elaborate on what might have caused the problems.
BBVA Compass is the U.S. division of Banco Bilbao Vizcaya Argentaria SA, Spain's second-largest bank.