UPDATE:
Eastbound lanes have reopened, but westbound lanes remain blocked after a wreck involving a tractor-trailer carrying hazardous materials, Arkansas State Police said.
The agency said shortly after 9:30 a.m. that all eastbound lanes were open. There was no immediate estimate on when westbound lanes would be cleared.
EARLIER:
An accident involving a tractor-trailer carrying hazardous material has shut down a portion of Interstate 40 in both directions in West Memphis.
Crews were on scene after 8 a.m. of the wreck at mile marker 273, said Arkansas State Police spokesman Liz Chapman.
Vehicles are being diverted at exits 271 and 275. Authorities shut down eastbound and westbound traffic on the interstate, Chapman said.
The truck that wrecked was carrying sodium cyanide, a hazardous material, and it spilled across the roadway, Chapman said. No one was injured in the accident.
Workers will be cleaning up the waste from the roadway for several hours, Chapman said, adding people should take an alternate route if possible.
Check back for updates.