Police have made an arrest in the recent shooting of a Walmart employee in Neenah, Wisconsin. Forty-six year old Justine Boyd of Greenville, Wisconsin was arrested today on a charge of first degree attempted intentional homicide after allegedly shooting a 56-year-old cashier at the Neenah Walmart just before 11:15 Wednesday morning.

Boyd, who also works at the store, was identified and arrested while officers were still securing the scene in the aftermath of the shooting. The motive for the shooting remains unclear, but the women apparently knew each other.

The victim, whose name has not yet been released, is in critical condition at Theda Clark Medical Center. She was shot once in the torso. The victim was a cashier in the liquor section of the store, which is where the shooting took place. Unsurprisingly, given the time, there were no customers in the area at the time.

Walmart spokesperson Diana Gee told local news media that Walmart was working closely with authorities to figure out what happened, and that Walmart is sharing its surveillance footage with police. She also said that Walmart employees are prohibited from carrying firearms while at work.

Police and Theda Clark personnel are planning a joint press conference for Thursday morning at 10 AM to give an update on the victim’s condition.