Six students walking home from school Tuesday afternoon in Pittsburgh were hit by a car.

The students, all from Pittsburgh Milliones University Prep, were injured.

Four of the students were walking on the sidewalk, two others were on the road, according to CBS affiliate KDKA.

The driver of the car was a teenage girl from the same school.

Police say she and a male passenger left the scene but came back later.

Four students were being treated at Children’s Hospital, and two others were taken to UPMC Presbyterian Hospital.

The teenage driver was taken into police custody for questioning.