Authorities say one man is dead and three others have been seriously injured in a blast at a south Louisiana oil facility.

State police say the explosion happened about noon Tuesday at a Marathon Petroleum Co. pipeline facility in Vacherie that stores and feeds crude oil to the company's refinery in Garyville.

Police say a crude oil pipeline had been shut down for repairs at the St. James Pipeline Station when a welding crew apparently ignited fumes. There was no fire after the blast, but police say a worker was killed and three others were hospitalized with burns.

A company spokesman had no initial information on the severity of the injuries.

The victims were not immediately identified.