Trump's Republican administration alleges the ban violates the Constitution's Second Amendment right to bear arms.
The sheriff's office said deputies fired a non-lethal weapon at the children, allowing them to secure the area and prevent anything further from happening.
A Pomona hospital is handing out free gunlocks to the community ahead of the holidays when accidental shootings tend to spike.
Wisconsin has a number of firearm-related laws in effect that limit access to children and individuals with a history of violence.
In what officials are calling a "gun related accident," a 2-year-old boy was fatally shot by his 7-year-old brother in a parking lot in Rancho Cucamonga.
The 11-year-old -- who is related to the victims -- "gave us a story at first that just didn't add up," Minden Police Chief Jared McIver told ABC News.