The Trump administration abruptly closed the Washington Monument after a recent visit by Interior Secretary David Bernhardt, who tested positive this week for coronavirus.

Interior spokesman Nicholas Goodwin said Friday that "a couple" of employees have quarantined since Bernhardt’s private tour, "resulting in a temporary workforce reduction at the monument and its temporary closure."

The National Park Service posted a brief notice of the closure on its website Thursday.

An official with an independent advocacy group for national parks and park workers on Friday criticized Bernhardt, saying the interior secretary had failed to protect employees' health and safety during the pandemic.

American flags fly around the Washington Monument Friday, Dec. 18, 2020, in Washington. The Trump administration has closed the Washington Monument because of a recent visit by Interior Secretary David Bernhardt, who tested positive this week for the coronavirus. Interior spokesman Nicholas Goodwin says a couple monument workers were quarantining as a result of Bernhardt's visit, forcing a staffing shortage and the monument's closure. (AP Photo/Manuel Balce Ceneta)

American flags fly around the Washington Monument Friday, Dec. 18, 2020, in Washington. The Trump administration has closed the Washington Monument because of a recent visit by Interior Secretary David Bernhardt, who tested positive this week for the coronavirus. Interior spokesman Nicholas Goodwin says a couple monument workers were quarantining as a result of Bernhardt's visit, forcing a staffing shortage and the monument's closure. (AP Photo/Manuel Balce Ceneta)

Bernhardt had been slow to allow closing of national parks to limit infection among park employees, visitors and local residents, said Kristen Brengel, a vice president of the National Parks Conservation Association.

National park employees also have expressed concern that Bernhardt and other Interior officials continue to visit national parks and other federal sites during the pandemic, Brengel said.

"It really is putting your own interest over the health and safety of park staff, is what it comes down to," she said.

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Goodwin said in an email that "the health and safety of the public and our employees is our top priority."

"Interior has an incredible team of more than 60 public health professionals on staff that have been leading the Department’s pandemic response efforts with the Secretary and other members of leadership over the past year," he said.

Goodwin said the Washington Monument, normally one of the capital’s most visited sites, would reopen Monday, with tickets going on sale Sunday.

The closure comes after the Interior Department disclosed Wednesday, after an inquiry from The Washington Post, that Bernhardt had tested positive.

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Bernhardt was quarantining and was currently without symptoms, Goodwin said in an email that day. Interior officials did not respond to questions Thursday and Friday about the secretary’s current condition. Nor have they said how Bernhardt may have been exposed.

The Park Service has been requiring members of the public to wear face masks and take other COVID-19 precautions at the monument since at least Oct. 1. Goodwin said no worker at the monument has tested positive for COVID-19 since then.

Bernhardt wore a mask and followed the safety recommendations issued by the Centers for Disease Control and Prevention during his visit to the monument, Goodwin said.

Eleanor Holmes Norton, the capitol’s representative in Congress, wrote to the Park Service head earlier this month, saying she was concerned the monument was not being operated safely and asking that it be shut down.

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Norton cited reports that "visitors are not uniformly following mask and social-distancing guidelines while on federal property, including inside the Washington Monument’s elevator."

"These behaviors put NPS employees and the public at significant risk," she said.

In the letter, Norton said she had learned of four infections and one hospitalization among Park Service workers on the National Mall, which includes the Washington Monument. Goodwin did not immediately respond to questions about coronavirus infections among Park Service employees and other Interior staffers on Friday.

To help stem a surge in infections, D.C. officials have imposed limits on public gatherings and recommended that nonessential workers stay home.

Bernhardt is one of numerous Trump administration staffers and officials who have become infected. That includes President Trump, who was hospitalized in October.

Bernhardt’s and the Park Service’s social media feeds have shown him keeping up a busy schedule of visits to national parks and other sites under his agency. Posts show Bernhardt wearing a mask during those visits more frequently now than in the first months of the pandemic.

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In the photos, uniformed Park Service employees often are the people standing nearest him, often without masks.