Novi police say two Farmington Hills women, 32 and 46, were inside the store shopping for school supplies when they got into an altercation with two other women, a 20-year-old and her 51-year-old mother, over a notebook.
WJBK-TV reported, "Both duos of women were not backing down, as police and witnesses described the two women pulling the younger woman's hair. That mother got shoved out of the way as the three continued to fight. That mother then pulled out a gun."
No injuries were reported.
WCRZ-FM reports all four women could face assault charges.
It is unknown which of the women, if any, walked away with the notebook.
The incident was caught on camera and posted to Facebook.