WNEM TV 5

Authorities are trying to figure out if the concrete was thrown or if it fell off the bridge.

One person was killed last night after chunks of concrete crashed through the windshield of a car at I-75 and Exit 131 near the Dodge Road overpass.

It's still unclear if somebody was throwing rocks and concrete off the bridge on the overpass, or if they were part of the bridge that came loose.

The identity of the man has not been revealed, and I-75 was closed for a period of time last night.We'll keep you up to date on this as we learn more from our news partner WNEM.