Ulster Bank customers have online services disrupted by NatWest cyber attack
Ulster Bank customers again found online services disrupted for a short time on Friday morning because of a cyber attack on another member of its RBS parent banking group, NatWest.
The hit came just days after Monday's glitch. It emerged that NatWest was the victim of a "deliberate attempt to disrupt" its operations.
The disruption lasted about an hour.
It did not affect bank card or cash machine transactions, said Ulster Bank, and was not connected to Monday's computer failure.
"Due to a surge in internet traffic deliberately directed at the NatWest website, customers experienced difficulties accessing some of our customer web sites," the bank said in a statement.
"This deliberate surge of traffic is commonly known as a distributed denial of service (DDoS) attack. We have taken the appropriate action to restore the affected web sites. At no time was there any risk to customers.
"The disruption began at 11:36am and ended at 12:30pm. We apologise for the inconvenience caused."
RBS is working to identify the origin of the attacks.