WASHINGTON (Reuters) -The Trump administration sent termination notices late on Friday to employees of a worker health and safety agency that provides research and services for coal miners, firefighters and others, despite appeals by a lawmaker from Trump's Republican Party to preserve its programs.

Employees of the National Institute for Occupational Safety and Health received reduction-in-force notices that said the job losses were necessary to reshape the workforce of the Department of Health and Human Services, according to a copy of the notices reviewed by Reuters.

Nearly all NIOSH employees were placed on administrative leave in February but around 40 who worked on coal-mining and firefighter safety were asked to return temporarily to work several days ago, the union for the agency's employees said. At least two of those employees have now been notified of termination.

U.S. Senator Shelley Moore Capito, a Republican from West Virginia, had lobbied Health Secretary Robert F. Kennedy Jr. to restore the programs, including the coal-focused work of its Morgantown, West Virginia, office.

The Department of Health and Human Services, which oversees NIOSH, did not immediately respond to a request for comment after regular business hours. A spokesperson earlier this week said NIOSH's functions would join the new Administration for a Healthy America, alongside multiple agencies. It was not clear whether any of the terminated employees would be transferred elsewhere.

Reuters reported last month that the halting of NIOSH's key services ended vital health and safety programs for coal miners, such as mobile health and lung screenings, and a program to relocate miners afflicted with black lung disease to less dusty parts of a mine.

There has been a resurgence of black lung disease in the last decade, including among young coal miners. At the same time, President Donald Trump has led a high-profile campaign to revive coal mining and use, which had been declining in the U.S.