Columbia police say an argument outside a child's birthday party ended in death.

Columbia, SC (WLTX) - Columbia police say a fatal shooting at a Rosewood Drive business was a case of self-defense, and no charges will be filed.

Police believe the incident began with two men arguing inside the Little Gym off Rosewood Drive during a kid's birthday party. The altercation continued in the gym's parking lot.

The man who died was armed with a knife, police say, and made threats before going to his car and getting a gun. The man then fired his gun at the person he was arguing with. That person, in turn, fired back, killing the man.