NEW YORK – Customers of New York City-based Citibank have lost access to much of their account information because of a computer outage.

Many of the troubled bank's clients haven't been able to retrieve account details online or by telephone since Tuesday afternoon. Others can access only parts of their account profiles.

Citibank telephone representatives say they don't know what caused the outage but technicians are working to fix it. They've been telling customers to call back after Wednesday morning.

A Citibank spokeswoman hasn't replied to a phone message or an e-mail sent after business hours.

Citibank is a division of Citigroup Inc., which is struggling to survive the global financial crisis with billions of dollars in aid from the government.