The Electronic Frontier Foundation (EFF) filed a lawsuit against the U.S. Department of Transportation on Wednesday for allegedly withholding records pertaining to the use of unmanned aircraft within the United States.

“Drones give the government and other unmanned aircraft operators a powerful new surveillance tool to gather extensive and intrusive data on Americans’ movements and activities,” said EFF Staff Attorney Jennifer Lynch. “As the government begins to make policy decisions about the use of these aircraft, the public needs to know more about how and why these drones are being used to surveil United States citizens.”

Any drone flying over 400 feet needs a certification or authorization from the Federal Aviation Administration, part of the DOT. But there is currently no information available to the public about who specifically has obtained these authorizations or for what purposes.