Northbound lanes of Ga. 400 were blocked Wednesday night in north Fulton County after a man was found dead inside a vehicle.

Around 6:45 p.m., a Georgia H.E.R.O. operator spotted a stationary vehicle on the right shoulder, underneath the Kimball Bridge Road overpass, according to George Gordon, spokesman for Alpharetta police.

When checking to see if the motorist needed help, the roadside worker instead found the man dead in the vehicle, Gordon said. Emergency responders believe the man, whose name was not released, had been shot, according to police.

The investigation into the incident forced officers to temporarily close Ga. 400 and re-route traffic off at exits. The roadway was expected to re-open shortly before 9 p.m., Gordon said.