9-year-old killed while trying to board school bus in Mississippi

MARIETTA, Mississippi -- An elementary school student died after a truck hit him while he was trying to board a school bus.

Officials say 9-year-old Dalen Thomas was walking across a highway in northeast Mississippi when he was hit by the pickup at about 6:30 a.m. Wednesday.

RELATED: Twin boys and sister fatally struck at school bus stop in Indiana

Three siblings were struck and killed and another child was injured at a school bus stop in Indiana Tuesday morning, Indiana State Police said.

An ambulance took Thomas to a nearby medical center. He was then airlifted to a children's hospital in Memphis, Tennessee where he died.

Officials say 22-year-old Hunter Newman was the driver of the truck. He's been charged with aggravated assault. His bond is set at $10,000.

The crash remains under investigation by the Mississippi Highway Patrol and the Mississippi Highway Patrol Accident Reconstruction Team.

Texas school bus safety rules after Indiana tragedy.