Marathon’s Huge Louisiana Refinery Rocked by Explosion, Fire (2)

Marathon Petroleum Corp.’s oil refinery near New Orleans exploded into flames on Monday, threatening to crimp fuel supplies and raise pump prices at a time of already rampant inflation.

The company’s Garyville, Louisiana, plant is one of the nation’s largest and a key supplier of gasoline, diesel and other fuels. Marathon said five people were injured. The blazethat started around 9:30 a.m. local time was declared extinguished about 4 1/2 hours later.

The fire occurred in a hydrocracker, according to a person familiar with the operation, a crucial price of equipment that breaks heavy petroleum molecules down into ...