(KMOV) -- St. Louis police are investigating a shooting in south city.

According to police, a man shot his step-daughter during an argument.

Police are not releasing many details in this case, but some people in the neighborhood say it all started with an argument.

News 4 arrived on the scene just moments after the shooting.

When our crew arrived, investigators were combing the area in the 4500 block of Nebraska and a young woman was on the ground with a gun shot wound to the head.

The incident happened around noon on Monday.

Police believe the victim's step-father may have shot her in the forehead.

A man riding his bike down the street says he saw the two arguing and was shocked to see what had happened. 

At this time the victim’s condition is not known.