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Police in Georgia said a one-year-old child died Saturday in a shooting that may have been carried out by his 3-year-old brother.

An adult left the gun in the same room as the children in a house in McDonough and one of brothers grabbed the firearm, described as a .45 caliber handgun, NBC station WXIA in Atlanta reported.

“There were adults in the room at the time but the adults were not paying attention … they did not actually see the incident occur,” said Lt. Mike Ireland of Henry Country police department.

Police are trying to determine if gunshot was self-inflicted by the victim or if his 3-year-old adopted brother shot him.

No charges have yet been filed and the older boy is being cared for by his grandparents.

“It’s a tragic time for all the family members,” Ireland said.

No further details were immediately available.