A Louisville resident who says the Givaudan explosion has worsened his health condition has filed a lawsuit and is seeking class-action status.

Two people are dead after a plant explosion in Louisville's Clifton neighborhood Tuesday afternoon. Here's what we know.

The lawsuit claims the company was negligent in the Nov. 12 explosion that killed two workers and injured 11 others.

National U.S. Chemical Safety and Hazard Investigation Board to explore fatal explosion at Givaudan facility in Louisville's Clifton neighborhood.

Federal safety investigators are on site at the Givaudan Sense Colour plant in Clifton a week after an explosion killed two employees and injured 11. The U.S. Chemical Safety and Hazard Investigation Board announced its six-person team of investigators arrived at the scene Tuesday to begin its inquiry into the accident.

The family of Kevens Dawson Jr., who died in an explosion at a Louisville manufacturing facility last week, had urged officials to return to the wreckage after initially being told all employees had been accounted for.