Emergency units responded to Old Don Pedro Road near J-59 around 2 p.m. Wednesday afternoon after a truck driver was struck in the head when his lumber load shifted.
The truck driver suffered serious head trauma and was taken to the hospital by helicopter. No other details are known at this time.
Emergency units also responded to an injury vehicle rollover on Highway 108 at Chicken Ranch Road west of Jamestown around 12:15 p.m. Wednesday.
The CHP reported lanes were blocked for a time backing up traffic in the area. Officers are investigating the crash.