CHARLESTON COUNTY, S.C. (WCBD) – The Charleston County Sheriff’s Office is investigating a Wednesday morning crash that injured the St. John’s Fire District Assistant Chief of Operations.

Deputies responded to the crash on U.S. Highway 17 at Davidson Road in the Ravenel area around 7:00 a.m. Wednesday.

CCSO said the driver of a tractor-trailer was traveling southbound on Highway 17 when he collided with a St. John’s Fire District SUV being driven by Assistant Chief Robert Whaley as it was turning left onto Highway 17 from Davidson Road.

Whaley became entrapped, but was quickly extricated by first responders. He was taken to the Medical University of South Carolina with serious injuries.

The driver of the tractor-trailer was not injured. Both were wearing seat belts.

The sheriff’s office said Whaley was not responding to a call at the time of the crash.

According to the incident report, the driver of the tractor-trailer ignored a traffic signal and was issued a citation.