A 3-year-old boy shot his 18-month-old brother Tuesday at a home in Hillsboro, Tenn., the Chattanooga Times Free Press reported.

Coffee County Sheriff Steve Graves said officials were investigating how the older boy got hold of a .25-caliber pistol, which had discharged and hit the toddler in the area of his head and neck, according to the newspaper.

The toddler is expected to recover, Graves said. Authorities were still questioning family members and it was unknown whether any charges would be brought.