Unidentified vandals spray-painted an explicit message on the Lincoln Memorial in Washington, D.C.
According to the National Park Service, the vandals sprayed "F**k Law" on one of the memorial's pillars, the Daily Mail reports. The graffiti was discovered around 4:30 a.m. on Aug. 15.
The message has been covered over with paper until a preservation crew can use a "mild, gel-type architectural paint stripper" to remove the paint in a way that won't damage the monument's stone.
"They vandalized the Lincoln Memorial, this beautiful masterpiece," said one child who was visiting the memorial.
It's not clear whether surveillance cameras captured the moments the vandals struck the monument. Defacing the Lincoln Memorial is a federal offense, according to the NPS.
Another smaller act of vandalism was found on the same pillar, but it appeared to have been there for some time. Someone had carved "M+E" into the pillar.
Some users on Twitter said the message looks to them like it says, "F**k Islam," Gizmodo reports.
"Someone vandalized the Lincoln Memorial with spray paint," said one user. "Looks to me like it says, 'F**k Islam.'"
Others on the social media service insisted that the message read "F**k law."
"Leftists are already lying about Lincoln Memorial," wrote one user. "It says 'F**k the law.' They are lying to their dumb base by saying it says 'F**k Islam.'"
"Fake news!" wrote another, later referring to anti-fascists. "There is no 'S' or 'Islam' there lol open your eyes. Lincoln Memorial was vandalized by ANTIFA."
The vandalism comes just a few days after a violent demonstration by white supremacists in Charlottesville, Virginia, that left one counter-protester dead. Those events began as a rally to protest the removal of a statue of Confederate leader Robert E. Lee.
Following the events in Charlottesville, anti-Confederate protesters in Durham, North Carolina, took down a statue of a Confederate soldier.
"It's frustrating, not only for the Park Service but certainly for the visitors that come here, that anyone would vandalize any of our iconic memorials," said a spokesman for the National Park Service, Mike Litterst, of the vandalism at the Lincoln Memorial.
"Especially the Lincoln Memorial. Especially with everything that's going on now -- the calls for unity and people to come together," Litterst added. "To go to the site of the memorial to Abraham Lincoln and do that, that's disappointing."
In February, the World War II Memorial, along with the Washington Monument and Lincoln Memorial were vandalized with graffiti related to conspiracy theories, according to CNN.
The vandals used permanent markers to write "Jackie shot JFK" and a message about the terror attacks on 9/11, U.S. Park Police spokesperson Sgt. Anna Rose said.