CHULA VISTA  (AP) — Authorities say a gunman has wounded two people, including his ex-girlfriend, and killed himself outside a Southern California Costco.

Police in Chula Vista say a man argued with the woman and her boyfriend Monday as they were putting groceries in a car in the parking lot of the store.

Police say the gunman then shot both of them and himself.

The wounded victims were taken in serious condition to a hospital to undergo surgery.

The woman’s child was in a stroller and wasn’t hurt.