A Charleston County Schools food service employee was fired Wednesday, accused of threatening another with a knife.

Both women were food service employees at West Ashley Middle School, according to Charleston County School District spokesman Jason Sakran.

Charleston police on Thursday arrested Tina Williams, 37, of Norwood Street in North Charleston, police spokesman Charles Francis said. She is charged with second-degree assault and battery by mob, Charleston County jail records show.

Charleston police were dispatched to the school’s cafeteria around 10:30 a.m. Wednesday after a dispute, an incident report states.

Witnesses told police that Williams saw two other workers talking and assumed they were talking about her.

Williams grew angry and grabbed a knife from a drawer, police said. According to the report, she approached one of the employees, a 46-year-old Hanahan woman, and said “I’ve been waiting on you.”

Another employee jumped between the two women and pushed Williams out of the room, police said. While leaving, Williams yelled that the fight wasn’t over and threatened to come to the other woman’s home, the report said.

According to the report, Williams has been fired by the school district and will be placed on trespass notice within the district.