The website for MasterCard is back after being inaccessible for much of Wednesday, likely the result of attacks by supporters of WikiLeaks.
MasterCard had pulled the plug on its relationship with the organization.
MasterCard says credit cards were not affected and account data has not been placed at risk.
By early afternoon, MasterCard’s site was once again operational. But on its Twitter feed the group that claimed responsibility for the attacks appeared to be preparing for its next target, Visa.
Like MasterCard, Visa had also stopped processing donations to WikiLeaks on Tuesday. Visa says its site is functioning normally.