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Troopers: Four people injured in collision including 11-year-old

CHARLOTTE, N.C. — UPDATE: An 18-month-old was also a passenger in the car that was rear-ended, according to police. All involved in the accident are expected to be OK. Police charged the driver who hit the other car with distracted driving.

An 11-year-old was injured after a vehicle rear-ended another car on Interstate 77, officials said.

The incident happened Saturday afternoon near Arrowood Road.

North Carolina Highway Patrol troopers said a trailer of a tractor-trailer came unhinged and caused a backup. A car did not see the line of cars stopped ahead and plowed at highway speed into the rear of another vehicle.

Medic said they transported four people injured in the accident to the hospital – three from rear-ended car and the driver from the other.

An 11-year-old child, sitting in the backseat of the car that was rear-ended, was injured. Medic described the child's injuries as potentially life-threatening and the other people's injuries as serious.