What on earth :STwo children of pre-school age have shot and wounded other youngsters in separate incidents in the US.
The house in South Carolina where a boy shot his brother
A three-year-old boy shot his four-year-old brother in Gray Court, South Carolina, with a .22-calibre handgun.
The injured child, who was airlifted to hospital with a gunshot wound to his stomach, has undergone surgery and is expected to recover.
The boys and their father had stayed overnight at a family friend's house when the younger brother woke up, found the gun under his bed and accidentally fired at his brother, Sheriff Ricky Chastain said.
He added: "Kids see things on TV, the toy guns, the three-year-old probably didn't know what he had as far as any intentions of hurting his brother.
"This is something the family will be dealing with for some time."
In the other incident, a two-year-old girl is in a critical condition in hospital after being shot by her four-year-old brother at their home in Las Vegas.
The children's father was at the house when the shooting happened, police said.
Officers are investigating how the boy managed to get hold of the 9mm handgun he fired at his sister.
Police spokesman Bill Cassell said: "While the brother was holding the weapon it discharged, striking his sister's torso."
He added: "At this time it appears the (boy) was able to gain access to the weapon because it was improperly secured."
The shootings came less than a week after a five-year-old boy shot and killed himself with a handgun in his father's vehicle outside a pharmacy in Las Vegas.
His father, 31-year-old Alex Kopystenski, has been charged with child endangerment.