The Washington Monument is temporarily closed due to "a reduction in its workforce resulting from a potential COVID-19 exposure," the National Park Service (NPS) says on its website.
The monument is expected to reopen Monday.
The NPS said earlier Friday it was working to staff the Washington Monument at appropriate levels to maintain safety for visitors and employees.
Tickets for Monday will become available on recreation.gov starting at 10 a.m. Sunday, the NPS said.
The monument had reopened to visitors Oct. 1 with a comprehensive safety program in place, the NPS said. Safety requirements include mandatory face coverings for anyone inside the monument, social distancing and online-only ticket distribution.
"We continue to work closely with the NPS Office of Public Health in following CDC and local public health guidance as we monitor and respond to developments relating to COVID-19," the NPS said.
The monument will be closed Dec. 24, Dec. 25 and Jan 1.