U.S. safety regulators announced early Monday they are opening a formal investigation into Tesla. The investigation will focus on the company’s Autopilot driver assistance system.

Reuters reports the National Highway Transportation Safety Administration (NHTSA) has identified 11 crashes involving Tesla Autopilot. These 11 all involve first responder scenes in which the Tesla vehicle ended up striking a vehicle near the scene while Autopilot is engaged. The investigation involves Tesla Model S, X, Y and 3 ranging model years 2014-2021.

Autopilot has been under scrutiny since its inception. Tesla has repeatedly coined the software as a “beta” that happens to be available to the general population.

Stay tuned for updates as this story develops.