Multiple injuries reported after explosion rocks Wisconsin oil refinery

WDIO-TV via Associated Press

This image from video provided by WDIO-TV in Duluth shows smoke rising from the Husky Energy oil refinery after an explosion Thursday morning, April 26, 2018 in Superior, Wis.

• Multiple people were injured in an explosion at a Husky Energy oil refinery in Superior, Wisconsin, on Thursday.
• Fire officials said six people were taken to hospitals, but their conditions are unclear.
• So far, there are no known fatalities.

At least several people have been injured in an explosion at a refinery in Wisconsin.

Authorities in Superior say the explosion at the Husky Energy oil refinery happened at about 10 a.m. Thursday. Superior Fire Chief Steve Panger says six people were taken to hospitals in Duluth, Minnesota. He doesn't know the extent of their injuries. Others were walking wounded. There are no known fatalities.

Local outlets, including The Duluth News Tribune, reported that as many as many as 20 people were injured after the blast.

A contractor who was inside the building told WDIO television that the explosion sounded like "a sonic boom" that happened when crews were working on shutting the plant down for repairs.

Panger says the fire was out by 11:20 a.m.

Superior police are advising people to stay away from the area and roads around the refinery have been blocked off. There have been no neighborhood evacuations.