Michigan State Police say there are no immediate reports of injuries. But Lt. Shannon Sims says the tanker driver hasn't been located and the wreckage of the truck can't be approached because of intense heat.
Sims says the tanker was headed north on I-75 when it exploded beneath the 9 Mile Road overpass about 8 p.m. Half the overpass has collapsed onto the northbound lanes of I-75 while the rest remains standing.
Sims says authorities don't yet know what caused the explosion.