A 56-year-old woman who works at the Neenah Walmart is in critical condition after being shot in the store's liquor section.
Police arrested a 46-year-old Greenville woman who also works at the store. Officers recovered a handgun at the scene.
No customers were in the liquor section when the shooting happened around 11:15 a.m. Wednesday.
The victim, who's a clerk in the liquor section, was taken by ambulance to Theda Clark Medical Center. Police say she was shot once in the torso.
A hospital spokeswoman says the victim is in critical condition. Her name was not released.
Neenah Police Chief Kevin Wilkinson says authorities have not determined what led to the shooting.
A Walmart spokeswoman tells Post-Crescent Media both women are cashiers.
Police think the women knew each other.