More than 100 million people across North America have had at least some of their personal information compromised due to a hack at Capital One Financial Corporation.
The data breach, announced Monday, occurred 10 days ago according to information released by the company.
It has affected about 100 million people in the United States and six million in Canada who have used Capital One services.
The FBI has the person responsible in custody.
In a news release, Capital One officials say they do not believe information obtained was used for fraud or disseminated by the perpetrator.
"Importantly, no credit card account numbers or log-in credentials were compromised, and over 99 per cent of Social Security numbers were not compromised," the release states.
"While I am grateful that the perpetrator has been caught, I am deeply sorry for what has happened," said Richard D. Fairbank, chairman and CEO. "I sincerely apologize for the understandable worry this incident must be causing those affected and I am committed to making it right."
The release added about 1 million Canadian Social Insurance numbers were compromised.
Those people will be notified, the company says.
Capital One also says free credit monitoring and identity protection will be available to those affected.