The eastbound lanes of I-20 near Six Flags reopened early Tuesday, nearly six hours after a truck hauling low-level radioactive material overturned.

Most of the eastbound interstate was shut down following the 11:30 p.m. crash, but all lanes were cleared just before 5 a.m., according to the AM750 and 95.5FM News/Talk WSB Traffic Center.

Crews were expected to return to the area near Six Flags Parkway at 10 a.m. to finish cleaning up debris along the shoulder of the interstate, according to the state Department of Transportation.

The Cobb County Fire Department's hazmat team was called to the scene overnight to assist with the clean-up.

"Our hazmat team got on the scene and they did find some low-grade readings of some sort of medical-related radioactive material," Cobb fire spokeswoman Denell Boyd told WSB.

No injuries were reported in the wreck.