Leaders of House and Senate committees want Capital One and Amazon to explain to Congress how a hacker accessed personal information from more than 100 million Capital One credit card customers and applicants.
The incident was the latest massive data breach at a large company.
Ohio Rep. Jim Jordan, the top Republican on the House Oversight and Reform Committee, asked for a staff-level briefing by Aug 15 on the breach that was reported late Monday.
The chairman of the Senate Banking, Housing and Urban Affairs Committee also said the committee will look into the matter. Sen. Mike Crapo, R-Idaho, plans legislation that would establish new data safeguards for consumers.