An anonymous reader writes The Finnish bank OP Pohjola Group has been a target of a dedicated DDoS attack for days. The attack, which investigators said was launched from both Finland and abroad, began on New Year's Eve. OP was forced to open a helpline for customers unable to confirm payments or transfer money because of jammed systems. On Saturday the firm said it would compensate people for any losses or late payment fees incurred as a result of attack. On Sunday morning the bank tweeted that its services were operating normally and even customers based outside Finland were able to access their accounts — and that it was still monitoring traffic carefully to try and ward off any renewed strikes. However, on Sunday afternoon further denial of service attacks took place delaying payments and preventing access to banking services for OP customers. A formal police complaint has been filed and OP says that KRP is looking into the case.