(KMOV) -- St. Louis County Officers are looking for a man who allegedly assaulted his ex-girlfriend and her brother in a parking lot on Saturday.
Police say the alleged assault took place in the 8900 block of Riverview when the ex-girlfriend and ex-boyfriend began arguing.
The brother stepped between the two to prevent the ex-boyfriend from harming his sister, but the confrontation turned into a fight.
Authorities say when the fight was over, the brother had lacerations on his neck, stomach, arm, and ear and his sister had lacerations on her forehead and chest.
The victims took themselves to a local hospital, where they are listed as stable.
The ex-boyfriend fled the scene. The investigation is ongoing.