The Federal Railroad Administration is set to announce what caused a fiery oil train derailment in southern West Virginia in February.
The agency has scheduled a news conference Friday morning at BridgeValley Community and Technical College in Montgomery.
A CSX train carrying 3 million gallons of Bakken crude derailed in the town of Mount Carbon during a Feb. 16 snowstorm.
Twenty-seven of the train's 109 cars derailed. Twenty cars leaked crude oil.
The derailment shot fireballs into the sky, burned down a nearby house and caused fires on the ground that smoldered for days.
The owner of the destroyed home was treated for inhalation injuries. No one else in the area was hurt.
Speed had previously been ruled out as a factor.