Citigroup (C) said it has resolved a "system outage" that happened early Friday afternoon.
A person familiar with the matter tells FOX Business the issues today weren't caused by 'external factors,' ruling out a cyber attack as the root cause. The person, who requested anonymity because of the sensitivity of the issue, would not elaborate further on the specifics of the problems Friday.
The bank informed customers of the outage via its verified Twitter account around noon on Friday, apologizing and promising to resolve the issue quickly.
I'm sorry for the inconvenience. We are aware of system issues at this time. We are working to get the issue resolved. ^KC
— Citi (@Citi) September 13, 2013
The problems come as many financial institutions face large-scale attacks to their network infrastructure that have in the past snarled access to online banking and other services in recent months