SUWANEE (AP) - Police are investigating the death of a woman whose body was found on an Interstate 85 entrance ramp outside Atlanta after a motorist felt as if they had hit something and pulled over to find the body.

Gwinnett County police tell CBS Atlanta (http://bit.ly/qby0wH) that the driver wasn't sure whether the victim was already on the ground when she was struck. Police said the cause of her death is not clear.

The body was found Friday morning on the entrance ramp from Georgia Highway 20 onto the southbound lanes of I-85.