The incident happened at about 7:30 p.m. Tuesday. A clerk at Rocket Fizz on the Delmar Loop reported that six juveniles began misbehaving and that she confronted them for stealing.
According to University City police, the clerk reported that the teens “began to become extremely aggressive, verbally assaulting her and approaching her while she was behind the counter.”
The clerk told police she displayed a knife out of fear and the teens left. They later returned, she said, displaying the same aggressive behavior.
The clerk said she feared for her safety, used pepper spray on the teens, and called the police.
University City police confirmed the department is investigating and obtaining surveillance video. The teens were not arrested, but were taken to the police department to be treated for exposure to pepper spray.
No one was seriously injured.