An 11-year-old boy was arrested Sunday in connection to the shooting death of his 9-year-old brother, Louisiana media reported.

The 9-year-old was shot and killed at a Baton Rouge, Louisiana, residence Saturday, police reported.

Authorities believe the boys were playing with a gun and the gun somehow discharged.

Police have charged the 11-year-old with negligent homicide in his brother’s death.

Investigators said they believe the shooting may have been accidental.

“By law the 11-year-old could be held in the juvenile detention center until he’s 18 years old, if convicted,” East Baton Rouge Parish District Attorney Hillar Moore said in a written release. “Obviously this case is very tragic and sad so we will review everything before we make any determination.”