PHILADELPHIA (AP) — Authorities say a gunman who apparently came to a Philadelphia park in response to a fight between women opened fire on a large group, killing the son of a high-ranking city police official.

Captain Jason Smith says 20-year-old Nicholas Flacco was with a group gathered Saturday night in FDR Park after tailgating at a Phillies game. Several fights between females broke out, and an unidentified woman was heard threatening to “call her man and that they should be afraid.”

Police say a man with a revolver arrived and fired a revolver into the air and to the side. He left but returned 10 or 15 minutes later and shot Flacco, the son of an Internal Affairs commander who was home from college for the weekend to celebrate his birthday.