The crash was reported in the southbound lanes of I-65 around 6:30 a.m. Wednesday, according to ISP Versailles post Sgt. Stephan Wheeles.
Okpeh's vehicle was hauling hazardous chemicals, including a non-flammable gas, a corrosive liquid (weed killer), a caustic acid, an oxidizing solid (dantobrom), and a corrosive liquid (glutaradehyde).
All homes within a half-mile of the crash were evacuated.
A crash on Interstate 65 in IN led to the leak of hazardous chemicals, and police have said that first responders are facing an explosion risk. All lanes were shut down as of 8:45 a.m.
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Sgt. Stephen Wheeles with Indiana State Police said crews responding to the cleanup faced an "explosion risk".
The cause of the crash is still under investigation.
Only one passenger in one of the semi trucks suffered minor injuries in the wreck. Traffic is being diverted off I-65 at Exit 50. Work is expected to last through the late afternoon hours. Northbound lanes of I-65 were also shut down. The northbound lanes reopened to traffic around 3 p.m., and the southbound lanes opened around 9 p.m. "It didn't take long then for the trailer and the tractor to catch fire". As a result of the fire, the asphalt on I-65 near the 43-mile marker was damaged.