Police are investigating a stabbing about 11:40 p.m. Thursday at a 137 E. Avondale Ave. home on the South Side.
Reports said officers were called for a stabbing and found Aaron Lamont Jones, 19, of Redondo Road running away from the home with a wound to his back.
Jones told officers he was at the home visiting a woman when the woman got into an argument with another man, and when Jones tried to break it up, he was stabbed.
Inside the home, officers found a knife covered in blood. There was no word on whether anyone else was inside the home when police entered.