The World War II Memorial on the National Mall in Washington, D.C., was vandalized on Thursday. Bright pink spray paint reading “Clean hands, dirty money” was found scrawled across its surface.

The memorial’s fountain was also tampered with, overflowing with bubbles and prompting U.S. Park Police to block off the area as they investigated.

An Army veteran named Debra Mortensen told reporters she was looking forward to seeing it but was “offended” by the act of vandalism. “It just makes me absolutely irate,” she said. “I was offended because people fought and died for our country, and it’s dishonoring our country and all we’ve been through.”

The Interior Department condemned the incident as an “utter disgrace” and vowed to find the person responsible. Interior Department spokesman Cody Sargent described the vandalism as “disgusting” and called the perpetrators “deranged losers.” He added: “It’s pathetic to deface a memorial to our WWII heroes.”

The memorial was previously vandalized in 2016 when a protest against the Dakota Access Pipeline led to spray-painted graffiti on the North Dakota section with the phrase “NoDAPL.”

Visitors expressed shock and sadness at the defacement. A woman from New Jersey said, “It’s really sad. It’s really sad to see that we can’t even experience it.” DC resident Ahmed Cisse noted that Park Police had secured the crime scene.

U.S. Park Police have blocked off the area but have not identified a suspect. The incident follows alleged vandalism to the new swimming pool liner coating the nearby Lincoln Memorial Reflecting Pool.