Salon: FBI Director Robert Mueller admitted to Congress Wednesday that drones are already being used over U.S. soil. While the use of surveillance drones domestically — both by local and federal law enforcement agencies — has been long anticipated and ushered in by a lobby with a powerful congressional caucus of supporters, Mueller’s admissions highlighted the lack of legislation currently in place to govern the use drone technology at home.

Mueller told a hearing that the FBI had used drones to aid its investigations in a “very, very minimal way, very seldom… Our footprint is very small, and we have very few and of limited use, and we’re exploring not only the use but also the necessary guidelines for that use,” he said.

Mueller’s acknowledgment is only the latest in a series of disclosures about the domestic use of drones. In 2010, it was revealed — and has since become common knowledge — that Border Patrol surveils both Canadian and Mexican borders with unmanned aircraft.