Google has been asked by the Illinois Attorney-General to submit details of all private traffic data it had collected from unencrypted Wi-Fi networks in Illinois and Massachusetts while gathering information for its Street View service.
Illinois Attorney-General Lisa Madigan said in a statement that she and Massachusetts Attorney General Martha Coakely had sent a joint letter to the company, demanding details of the data that had been collected by its Street View cars.
The state prosecutors also expect to be told exactly what the company plans to do with the information.
Business Week reports that Connecticut Attorney-General Richard Blumenthal has said that 30 state Attorney-Generals have been discussing the company's actions.
Search giant Google has met criticism from governments and privacy groups worldwide since it confessed to have "mistakenly" collected sensitive user information from unsecured Wi-Fi connections around the world.