BP's 435,000-barrel-per-day (bpd) Whiting, Indiana, refinery was operating normally following a leak from a pipeline that transports liquid material, the company said. On Thursday, the refinery experienced a leak from a pipeline within the tank field,

BP responded after a gas leak from one of its small underground supply lines at its refinery in Whiting, Indiana, caused an odor in the Chicago area. A spokesperson for the refinery said on Thursday that the refinery experienced a release from a pipeline that transports material within its tank field.

The company has located and isolated the leak and brought in vacuum trucks to help with the cleanup. They have also set up air monitoring systems to keep an eye on any potential risks. BP said it is closely monitoring air emissions for any contaminants that could be harmful to public health,

A leak at the BP Whiting Refinery is releasing "odors" into parts of the Chicago area as crews work to respond to the situation, officials said Thursday.