Wells Fargo has become the latest US bank to see its Web site under cyber-siege, with the group claiming responsibility promising further attacks.
Following last week's Web site access issues at Bank of America and JP Morgan Chase, Wells Fargo has confirmed that it too saw intermittent access problems yesterday, taking to Twitter to apologise to customers.
Earlier, in a pastebin post, a group called QassamCyberFighters had warned that it would carry out the attack as part of 'Operation Ababil', a campaign to target US financial institutions in retaliation for the release of a film mocking the prophet Mohammed.
The post also contested recent media reports that Iran actually carried out the BofA and Chase assaults as part of a long running campaign in response to US economic sanctions on the country.
"Some US officials tried to divert people's attention from the subject and claimed that the main aim of the operation was not deal to insults but it had other intentions...We strongly reject the American officials' insidious attempts to deceive public opinion," says the group.
Encouraging people to join its DDoS efforts, QassamCyberFighters promises to bombard institutions for eight hours daily until "the removal of that sacrilegious movie".
Following Wells Fargo, US Bank is set to be today's target, with PNC slated for Thursday. If America's "arrogant government do not submit" the attacks will escalate and include other "evil countries" such as Israel, France and the UK, concludes the post.