(Reuters) – A worker died at a Goodyear Tire and Rubber plant at Danville, Virginia, on Friday, the fourth fatality in a year at the site, state officials said.

Goodyear said it had reported the death to the federal Occupational Safety and Health Administration (OSHA) and would cooperate with it.

“Our hearts go out to the family, friends and co-workers of the employee during this very difficult time,” the statement said.

The employee’s identity and the circumstances of the death at the plant about 250 miles southwest of Washington were not announced.

The death at the plant was the fourth since August 2015, a spokeswoman for the Virginia Department of Labor and Industry said. The department has sent a team to the Goodyear site, she said.

Investigations into the previous three deaths have not been concluded, said Ron Graham, health director of the Virginia Occupational Safety and Health Program, which oversees federal workplace rules in the state.

The Virginia agency issued three violations totaling $16,975 in fines in February for the accident last year, according to an inspections report on the OSHA website. Goodyear is contesting the penalties. The other two accidents, prior to Friday, took place this year.

(Reporting by Ian Simpson in Washington; Editing by Phil Berlowitz)