Authorities in Southeast Texas are trying to determine if the 4-year-old stepson of a sheriff's sergeant shot himself in the head with his stepfather's service weapon.
The Harris County sheriff's office says the child was airlifted to a hospital in critical condition after the shooting Tuesday.
Spokesman Senior Deputy Thomas Gilliland says a person at the scene said the boy shot himself at a home near Hockley, about 35 miles (55 kilometers) northwest of Houston.
The sergeant works for the Harris County sheriff's office, which is conducting internal and criminal investigations.
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Gilliland says the sergeant is on family leave.
Police said Sunday that a Houston toddler fatally shot himself in the head. San Antonio police reported Wednesday that a toddler was wounded in the abdomen after a handgun accidentally discharged.