TAMPA - The Hillsborough County Sheriff's Office said Monday it is handling a death investigation at the Big Bend Power Plant.

Officials at TECO confirmed that a contractor was killed. It was not a TECO employee.

TECO did not release a cause of death, but a family member of the victim said the person fell about five stories.

"We are deeply saddened to confirm the loss of a contractor at the Big Bend Power Station. We extend our thoughts and prayers to his family, friends and co-workers," TECO said in a statement. "The safety of our employees and contractors is always our first priority at Tampa Electric. We are conducting a thorough review of this incident."

The power plant was the site of a 2017 accident in which five people were killed.

Workers at the plant were trying to unplug a blocked tank when molten material poured onto them. Two of the workers died that day - three more victims passed away later from their injuries.