A shooting occurred inside a Costco store in Corona, California, on Friday evening, police said. One person was killed and three others injured, including the alleged gunman. A man is in custody after firing his weapon inside the store, a Corona police officer confirmed, but the alleged shooter's name has yet to be released. The shooting reportedly followed an argument inside the store, though the relationships between the victims and the alleged shooter remain unclear. It is not believed to be a domestic dispute and police are not looking for anyone else in connection with the crime. The alleged gunman and the injured victims were taken to hospitals; the extent of their injuries is unknown.

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