At least one person has been killed and another is feared dead after a massive fire erupted Friday on an oil platform in the Gulf Coast. Another four workers have been hospitalized, two in critical condition. The rig’s operator, Black Elk Energy, says only a small amount of oil was spilled as a result of the blast. It came just one day after the oil giant BP agreed to pay a $4.5 billion fine for the 2010 Deepwater Horizon oil rig explosion that killed 11 people and caused the worst offshore oil spill in U.S. history.