Husky Energy Inc. is responding to a fire at its Superior Refinery that occurred this morning and has been extinguished, according to CEO Rob Peabody. The incident occurred during a maintenance turnaround, Peabody told the company’s annual meeting today.

The 50,000 bbl/d facility, located in Superior, Wis., in the U.S. Midwest, processes light and heavy crude oil. Husky just completed its first full quarter as owner of the facility, which it purchased in November 2017 from Calumet Specialty Products Partners LP.

The refinery produces asphalt, gasoline, diesel and heavy fuel oils. Its associated logistics include two asphalt terminals and 3.6 million bbls of crude and product storage.

A project to increase the heavy oil processing capacity at the Superior Refinery is underway and expected to be completed in the first half of 2018.

At least 20 people were injured in the incident, the local ABC affiliate reported. A local fire official confirmed the blast.

“We are aware an individual has been transported to the hospital,” Husky spokesman Mel Duvall said.

“It shook our store. Everyone was wondering what was going on. You could see the lights flickered, it knocked out one of our computers, it shook the ceiling,” said Tammie Carroll, an employee at Super One Foods in Superior. – with files from Reuters