WASHINGTON: Top US lawmakers on Tuesday wrote to Google's chief executive raising concerns about reports of a massive database known as Sensorvault that allegedly contains precise consumer location information from hundreds of millions of devices.

The letter from Democrats and Republicans on the US House Energy and Commerce Committee to CEO Sundar Pichai seeks a briefing and answers on how this information is used and shared, citing a New York Times report that the database includes nearly every consumer with an Android mobile device, in some cases storing information dating back to 2009.