However, some cardholders may be getting money from ATMs even if they do not those funds in their accounts.
The bank's spokesperson said this is because 'in a crisis situation, each individual card holder has an offline line'.
Those customers withdrawing more than they have in their accounts will incur normal charges.
A spokesperson said it is an 'unforeseen temporary technical issue', which the bank is working to resolve.
Tellers could not access the up-to-date balance on customers' accounts during the day.