The fire that sent flames and black smoke into the air and across the area appears to be under control Wednesday afternoon.
Dearborn police and fire officials report no serious injuries.
State police Lt. Michael Shaw says he believed the truck was hauling petroleum. The tanker burned with a car stopped sideways in front of it.
Michigan Department of Transportation spokeswoman Diane Cross says fuel spilled into the sewers, also creating fires.
Shaw says the first 911 calls came in about 11:15 a.m. Police were waiting for crews to extinguish the flames before investigating.
State transportation officials say the freeway could remain closed for hours.
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