UPDATE 3/27/19 10:09 a.m.
KARK 4 News in Little Rock reports the Arkansas Department of Emergency Management confirms one person has died in a hazardous truck explosion.
Officials told KARK-TV the carrier vehicle was a tanker, not a hopper.
A hopper car or hopper wagon is a type of railroad freight car used to transport loose bulk commodities such as coal, ore, grain, and track ballast.
The explosion was felt in a 60-mile radius.
200 to 300 yards of a forest was on fire around the explosion.
View more photos for the aftermath here.
Original Post 3/27/18:
KARK 4 News in Little Rock is reporting a truck carrying ammonium nitrate exploded in western Ouachita County near Camden.
A one-mile radius along U.S 278 near Highway 57 is being evacuated following a tanker truck accident.
The truck was carrying ammonium nitrate, which is a toxic chemical. There are reports of citizens feeling the explosion as far as El Dorado.
This story is still developing and will be updated as more information becomes available.
Photo submitted to KARK 4 News via Twitter by Stephanie Sharp.