All but one lane is blocked on I-75 southbound near Locust Grove after a wreck that killed four people, authorities said.

The crash happened about 11:30 a.m. Thursday at Bill Gardner Parkway (Exit 212). Capt. Randy Lee with the Henry County Sheriff’s Office confirmed the fatalities but could not provide further details.

“Investigators are currently investigating the cause of the collision,” he said in a statement.

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