A vehicle includes a vehicle body defines an occupant cabin. The vehicle body includes a ceiling above the occupant cabin and a floor below the occupant cabin. The vehicle includes a partition extending from the floor to the ceiling and dividing the occupant cabin into an officer compartment and a detainee compartment. The partition has a front surface facing the officer compartment and a rear surface facing the detainee compartment. An airbag is supported by the partition and is inflatable into the detainee compartment.