Reporters at Gizmodo appear to have unmasked NextDroid , a mix of Carnegie Mellon University and Massachusetts Institute of Technology graduates working on driverless cars and undersea robotics, according to the website’s reporting.

The mystery started Thursday when a tipster sent Gizmodo a photo a sleek, black Cadillac sedan parked in Pittsburgh with what looked like a suite of sensors used on self-driving cars. Gizmodo posted the photo and asked: “So who does this car belong to?”