Gwinnett County police and medical units were on the scene of a serious rollover wreck with an ejection Tuesday afternoon on Ga. 316 at Sugarloaf Parkway.

The single-vehicle wreck happened shortly after noon, according to Gwinnett fire Capt. Tommy Rutledge.

Rutledge said the driver was unconscious and unresponsive after being ejected from the vehicle, and was taken to Gwinnett Medical Center in critical condition. Two of his passengers were also taken to the hospital, Rutledge said.

The identities of the driver and passengers were not immediately available.

All westbound lanes of Ga. 316 were temporarily closed but re-opened shortly before 2 p.m., according to the WSB 24-hour Traffic Center.