Faint Markings Reading '8647' Appear on Washington Monument Lawn, Investigation Underway

C. A Reuters photographer spotted the markings from atop the monument just before federal authorities arrived. Photos show the most visible digit as an "8," with the "6" and "7" less distinct and the "4" barely discernible against the grass.

The World War II Memorial is visible in the background of one image, while another wider shot looks toward the Lincoln Memorial. U.S. m. to a report of vandalism.

Officers noted that the numbers "8647" had been marked in the grass and stated that the cause of the discoloration has not yet been determined. Grass samples were collected for testing, and the investigation remains ongoing, according to the agency.

U.S. Park Police will hold those responsible accountable. The term "86" is slang meaning to "throw out" or "get rid of," according to Merriam-Webster, and originated at soda counters in the 1930s.

U.S. Capitol and is scheduled to host events marking the nation's 250th anniversary.