DEKALB COUNTY, Ga -- Authorities say a driver was fatally shot after a traffic accident on Interstate 285 Monday afternoon.

According to the DeKalb County Sheriff's Office, the accident happened on I-285 south at E. Ponce de Leon Avenue just before the afternoon rush hour.

According to authorities, a pick-up truck and a Lexus vehicle were involved in the accident. An argument ensued after the wreck, and the truck driver allegedly shot and killed the driver of the Lexus.

The pick-up truck driver stayed at the scene and has been taken into custody.

Authorities are not yet sure what caused the accident, or what led to the shooting.

Commuters experienced heavy delays as police investigated the incident.

PHOTOS: Person shot on I-85 after accident