At least three young people were treated at a local hospital Thursday when a police officer working the hallways at Jack Robey Junior High School in Pine Bluff Arkansas pepper-sprayed a group of students returning from lunch.

School superintendent Jerry Payne told the Associated Press that the officer used the spray because, in AP’s paraphrase, “students weren’t getting to class quickly enough.”

One mother, a volunteer at the school, says her daughter’s face swelled up as a result of a severe allergic reaction to the spray, requiring her to be hospitalized for several hours.

The Pine Bluff Police Department has issued no statement on the incident, which took place four days ago. A local television station has filed a Freedom of Information Act request for the officer’s Use of Force Report.