The incident occurred at Smitty's Supply, a lubricant manufacturer located in Roseland in Tangipahoa Parish, local officials said. A large plume of smoke could be seen following the explosion.
The explosion was reported shortly before 1 p.m., according to Tangipahoa Parish President Robby Miller.
The Tangipahoa Parish government shortly ordered a mandatory evacuation for those in the immediate area, that then expanded to within a 1-mile radius of the plant.
"Relocate IMMEDIATELY and stay away from this area until further notice," the Tangipahoa Parish Sheriff's Office said on X.
An elementary school located within the evacuation zone was evacuating students to a location in Amite City.
No injuries have been reported, "which is a godsend," Miller said at a press briefing late Friday afternoon.
The fire remains active, and the Louisiana Department of Environmental Quality has been monitoring the environment, Miller said. It's unclear what caused the explosion, he said.
Smitty's Supply manufacturers and distributes lubricant, including motor oils, according to its website. About 400 people work at the plant, according to Miller.
Highway 51 at Highway 10 in Roseland closed following the explosion.
"We are monitoring this situation closely. Please follow the guidance of your local officials," Louisiana Gov. Jeff Landry said in a statement on X. "We are praying for everyone’s safety."
