A boy was injured Sunday evening when his dirt bike struck a wooden post, the Pierce County Sheriff's Department reported. The boy, whose name was not released, was riding in the ditch along a paved road in Oak Grove Township just after 5 p.m. He hit the road sign post, was ejected and landed in the grass.

Prescott Ambulance Service treated the boy at the scene for undetermined injuries, and he was then transported to Regions Hospital in St. Paul by North Air Care Helicopter. The boy was wearing a helmet at the time of the crash.

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Prescott Fire Department also assisted at the scene.