Eighteen of the 26 faceless, life-sized statues that have been on display since August at Grant Park have been defaced with graffiti for the first time.

“I was at the park today and saw a kid run up to one of the statues,” Bob O’Neill, president of the Grant Park Conservancy, said Saturday. “And the kid stopped and said, ‘Mommy this one has graffiti.’ People take so many photos, just defacing them is very upsetting.”

O’Neill said the vandals likely struck late Friday or early Saturday.

“We don’t have any cameras,” he said. “Sometimes, I think we could really use them.”

Icelandic artist Steinunn Thorarinsdottie created the faceless statues, titled “Borders,” which are display at Grant Park until October near Michigan Avenue and East Jackson Drive. They previously were on display in New York and Dallas and are due to move on next to Detroit.

O’Neill said he isn’t sure how much it will cost to repair the artworks, which are half silver-aluminum and half iron.

“You don’t want to wreck the art,” he said. “It all depends on the finish.”