Wisconsin: Oil refinery explosion
Wisconsin: Oil refinery explosion (WCCO/KBJR/CNN)
Over a dozen people were injured after an explosion at a refinery in Wisconsin.
It happened at the Husky Energy Oil Refinery in Superior.
Emergency officials were called out for what was described as an explosion involving a small tank.
Witnesses reported the initial blast sounded like a sonic boom.
Authorities are now evacuating people who live ten miles south of the refinery.
The city's fire chief says the fire has been extinguished.
More information: Explosion rocks Wisconsin oil refinery, hurting at least 5