Police were called to an apartment at 700 West Rice where they found a man with a stab wound to the back... and a woman who had been hit several times in the face.
Investigators say the woman stabbed the man in self-defense.
He was taken to the hospital and charged with two counts of aggravated assault.
The woman was treated at the scene.
An argument led to a fight... and then a stabbing in north Sioux Falls overnight.