0709 GMT February 29, 2020
Police said that the shooting happened at a residence in southwest Charlotte on Saturday night.
Officials are searching for suspects after the incident.
A family celebration was held in the front yard, said Deputy Chief Jeff Estes of the Charlotte-Mecklenburg Police Department.
"We want to make sure we get all the information we can, as soon as we can, so we can get it solved," he said.
The boy was nine years old and he was pronounced dead at a hospital.
The other victims were two adults and another child. They suffered non-life-threatening injuries and were treated at the scene.
Police said it is investigating the shooting incident.
The University of Chicago Crime Lab and the Centers for Disease Control says 87 people on average die each day as a function of gun violence in the US, with an average of 183 injured.
Murder rates have increased in cities across the country this year with over 30 cities reporting a rise in violence from a year ago, a report says.
Since the beginning of this year, there has been an average of one mass shooting per day in the United States, according to a website called Mass Shooting Tracker.