New York, June 16 (PTI) Citigroup Inc said a credit card data breach that took place in May affected over 360,000 accounts, around 80 per cent more than the initial figure revealed by the bank last week.
In a statement issued late last night, Citigroup said "a total of 360,083 North America Citi-branded credit cards were affected. Only accounts issued in the US were impacted."
Citigroup reiterated its earlier statement that 1 per cent of its credit card customers were affected.
But as per the bank's annual report, Citi Cards has about 21 million customers in North America, 1 per cent of which would amount to just around 200,000 cards.
While Citi Cards' Account Online system was compromised, the main cards processing system was not. Other Citi consumer banking online systems were not accessed or compromised, Citigroup said.