Dutch banks say a cyberattack has affected their online services, but did not breach the security of customers' accounts.
The Netherlands Association of Banks says Dutch and some foreign banks were hit by a denial-of-service attack, in which huge amounts of data overwhelm servers—like hundreds of letters being jammed through a mail slot at the same time.
The association did not say who was responsible for the attack Friday.
In the Netherlands, the attack temporarily forced Internet and mobile banking sites of the ING bank offline and also affected online payments for other banks.
The association stressed that bank customers could still get cash and pay bills at ATMs.
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