NEW YORK - After a four-hour automated teller machine network failure on Tuesday that left some customers without access to their cash, Citigroup Inc. said Wednesday that it had largely fixed the problem, but that there continued to be intermittent ATM outages.

The company's cash machines went down at around 5 p.m. Tuesday and were largely fixed four hours later. On Wednesday, Maria Mendler, a Citibank spokeswoman, said there had been "scattered outages" that morning, most of them in the New York metropolitan area, which is home to 1,300 of the bank's 2,000 ATMs.

Ms. Mendler said she did not know the source of the problem, but said Tuesday was a particularly high-volume day at ATMs, because it was the day after Labor Day.

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