Cosmo Oil Co. tried to punish an employee who in late April blew the whistle in connection with a leak of personal customer data, sources said Tuesday.
On the morning of April 21, a message appeared on an Internet bulletin board claiming that data pertaining to holders of credit cards issued by the oil distributor had been leaked, they said.
The message said Cosmo Oil executives were "busying themselves covering up the leakage," and urged a swift announcement on the matter by the company to prevent any further leakage.