( KTRS ) Police in Wentzville are investigating after a woman working inside the GM assembly plant was stabbed five times.

The attack happened Wednesday night. Police report that a female suspect surrendered herself to Wentzville police around 5:30 Thursday evening and charges were expected to be filed Friday morning.

Police say the victim’s injuries are not life-threatening.

The GM plant operates around the clock. Security was increased in November after threats against minorities were discovered on restroom walls.