Waymo alerts police after two 15-year-olds are accused of drinking alcohol and shooting toy gel-bead “Orbeez” guns from inside a driverless vehicle in San Mateo, California. The incident occurs Monday afternoon, when Waymo’s remote monitoring system detects suspicious behavior through interior cameras and microphones. According to reports, Waymo calls the San Mateo Police Department with the vehicle’s location and then disables the robotaxi, moving it to stop near a nearby lot while keeping the passengers inside until police arrive.

Because the initial report described what appeared to be a real firearm, police conduct a high-risk stop, approaching with guns drawn and deploying a K-9 unit. Officers later determine there is no real gun: the device is an Orbeez-style gel blaster. The teens are detained, cooperate with police, and are released to their parents. Police say they plan to review and potentially remove Waymo’s interior video, and the case is forwarded to the San Mateo County District Attorney’s office to determine whether charges may be filed, including for underage drinking.

Waymo states the behavior violates its user agreement and says safety is its top priority.